Financial terms starting with “I”

96 terms · plain-language definitions for lifelong students and investors · Full glossary

I-Bond: A Series I US savings bond whose interest is designed to keep pace with inflation, bought at TreasuryDirect.gov. It is locked for 12 months (with a 3-month-interest penalty if redeemed before 5 years) and capped at $10,000 per person per year, which makes it a useful inflation-protected supplement to an emergency fund rather than a core growth holding.
Iceberg Order: A specific kind of partially-hidden order that displays a small visible slice while keeping the remainder hidden. As the visible slice fills, the engine automatically refreshes it with another visible piece from the hidden reserve. Iceberg orders are the standard tool for institutional traders working a large quantity without signaling the full size to the market. The visible tip is what other participants see; the iceberg below is what they cannot.
Idea Funnel: The stage-gated pipeline through which raw investment ideas flow before becoming positions: capture, first-look screen, preliminary memo, full diligence, pitch to committee, position-build, and post-mortem. The funnel exists as a forcing function for honesty -- most ideas should die in the middle of the funnel, and a sourcing process that converts a high percentage of captured ideas into positions is almost certainly under-killing rather than identifying real edge.
Idea Screen: The first-pass test on whether a name is an attractive STANDALONE investment -- per-name thesis, catalyst, kill criteria, expected value, asymmetry. A name that fails the idea screen ends the conversation; a name that passes is promoted to the portfolio-fit screen for the second-pass test on whether the position makes the existing portfolio better. The idea screen is what ptk-1 through ptk-4 covered; the portfolio-fit screen is a separate decision that the idea screen does not subsume.
Idea Velocity: The rate at which an investor or research desk produces new credible ideas. High idea velocity per unit of time is the upstream metric for sourcing; the goal of sourcing hygiene is to maintain idea velocity while keeping signal-to-noise high enough that the ideas are worth working. A retail investor producing one credible idea per month at high signal-to-noise is in better shape than one producing ten ideas per month at low signal-to-noise.
Identifiable Net Assets: The fair value of all specifically identifiable assets minus liabilities acquired in a business combination. Goodwill equals purchase price minus identifiable net assets. Assigning value to identifiable intangibles (brands, patents, customer lists) reduces the residual goodwill recorded.
Identification Period: The 45-day window after a 1031 exchange sale closes during which the seller must identify in writing the replacement property or properties they intend to acquire. The 45-day deadline is strict and not extendable; missing it disqualifies the exchange entirely and triggers immediate recognition of the deferred gain. The identification rules permit identifying multiple potential replacements (commonly under the three-property rule or the 200-percent rule), giving the seller some flexibility, but the timing is unforgiving.
IFRS: International Financial Reporting Standards — the accounting rules used in over 140 countries outside the US. Key differences from US GAAP include: LIFO is prohibited, development costs may be capitalized, impairment reversals are allowed, and there is less rules-based guidance.
IFRS 16: The international accounting standard equivalent to ASC 842, requiring lessees to recognize right-of-use assets and lease liabilities for all leases longer than 12 months. Effective since 2019, it made lease obligations visible across most of the world's public companies.
IFRS 9: The international standard for financial instruments classification, measurement, and impairment. It replaced the older IAS 39 and aligns with CECL concepts for credit loss provisioning. IFRS 9 also changed classification categories, eliminating "available-for-sale" as a separate category for equity instruments.
IG Spread: The premium that investment-grade corporate bonds pay over Treasuries. Widens during economic stress as investors demand more compensation for risk.
Illiquidity Discount: The aggregate term covering any discount applied to a private-company or restricted-stock equity stake to compensate for the lack of a liquid market for the shares. DLOM is the most common specific form; related discounts include the lack-of-control discount (DLOC) for minority stakes in closely-held businesses and the blockage discount for large concentrated positions that cannot be sold without market impact. Aggregate illiquidity discounts on minority private-company stakes routinely exceed 40% when DLOC and DLOM stack.
Illiquidity Premium: The expected excess return that compensates investors for holding assets that cannot be easily sold. The premium is supposed to exist for art, collectibles, private equity, and direct real estate -- but the empirical evidence is mixed: the Mei Moses art index excludes pieces that never come back to market (survivorship bias), and most measures of private-equity returns rely on self-reported NAVs rather than transacted prices.
Illusion of Control: The belief that you can influence outcomes that are actually determined by chance — such as believing your research gives you an edge in a coin flip. In investing, the illusion of control drives overtrading and excessive confidence in short-term predictions that are inherently random.
Impairment: A permanent write-down of an asset's book value when it becomes worth less than it's carried on the balance sheet. Goodwill impairments are the most visible kind. Impairment charges reduce earnings but are non-cash, so they're often excluded from adjusted metrics.
Impairment Reversal: Under IFRS, a previously impaired asset can be written back up if conditions improve — except for goodwill. Under US GAAP, impairment reversals are generally not permitted. This means IFRS balance sheets can recover value; GAAP balance sheets cannot.
Implied Correlation: The correlation level that, when plugged into the variance-of-a-portfolio identity (index variance = sum of weighted single-name variances plus weighted covariance pairs), reconciles the observed implied volatility on an index with the implied volatilities on its constituents. Reverse-engineered from option prices, not directly observed. Tracking implied correlation over time reveals when the market is pricing in elevated co-movement (typical during stress regimes) vs differentiation across single names (typical during calm regimes). The input for dispersion-trade construction.
Implied Growth Rate: The perpetual growth rate that, when plugged into a DCF (typically single-stage Gordon growth or multi-stage with explicit + terminal periods), produces a fair value matching the observed market price. The output of a reverse DCF. The implied growth rate is not a verdict on whether the price is right; it is a CONSTRAINT — the assumption the market is implicitly making. The investor's analytical job begins after the calculation: comparing the implied rate against the company's own track record, industry growth, and the long-run nominal GDP ceiling (~4% in the modern US). Implied rates above all three are aggressive bets; rates below all three may signal pessimism that's either justified (structural decline) or an opportunity (mispricing).
Implied Multiple Check: A DCF sanity check that backs out the multiple implied by the model's terminal value (terminal EV divided by terminal EBITDA) and compares it to the peer trading-multiple set and the company's historical multiple range. A 30-40% gap between the implied multiple and the comp median is a red flag that the DCF is talking itself into a number the market has never historically validated for this business or its peers.
Implied NOI Growth: The level of future net operating income growth that current property pricing requires to deliver a market-clearing return. When cap rates compress below long-run historical spread norms, the difference is either rising implied growth expectations (sustainable if growth materializes) or falling risk premiums (vulnerable to a sentiment reversal) -- the cap rate decomposition framework attributes the compression to one or the other. The investor exercise on any compressed-cap-rate market is to test whether the implied growth required to justify the price is achievable.
Implied Volatility: The market's forecast of how much a stock's price will move, derived from option prices. Higher IV means options are more expensive because bigger moves are expected. IV often spikes before earnings and during market stress.
Implied Volatility (IV): The market's forward-looking expectation of how much a stock will move, derived from option prices. High IV means options are expensive because big moves are expected. IV typically spikes before earnings and collapses after (the "IV crush"). Comparing current IV to historical levels reveals whether options are cheap or expensive.
Impossible Trinity: Also called the Mundell-Fleming trilemma. The proposition that a central bank cannot simultaneously have a fixed exchange rate, an open capital account, and an independent monetary policy. Any country must give up at least one of the three: a peg with open capital flows surrenders monetary independence (Hong Kong); a float with open capital flows preserves monetary independence (US, UK, eurozone); a peg with monetary independence requires capital controls (China historically). The trilemma is the central organizing principle of international macro policy choice.
In the Money (ITM): An option with intrinsic value — a call whose strike is below the current stock price, or a put whose strike is above it. ITM options are more expensive but behave more like the underlying stock (higher delta). Deep ITM options are sometimes used as stock substitutes.
In-Kind Creation: The process by which an authorized participant delivers a basket of underlying securities (matching the ETF's holdings) to the issuer and receives newly created ETF shares in return, at NAV. Because the transaction is a security-for-security swap rather than a cash purchase, the issuer never has to buy stock on the open market to back the new shares. This same in-kind structure is what gives ETFs their tax-efficiency edge over mutual funds, since the issuer can also redeem appreciated lots in kind (see In-Kind Redemption).
In-Kind Redemption: The process by which an authorized participant returns ETF shares to the issuer and receives a basket of the underlying securities in return. Because the issuer hands out stock instead of selling it on the open market, no capital gain is realized at the fund level. This is the load-bearing mechanic behind ETF tax efficiency: appreciated lots can be flushed out the back door during redemptions without triggering distributions to remaining shareholders. Mutual funds cannot do this because their structure forces cash settlement on redemption.
Incentive Fee: The performance-based compensation paid to a BDC's external manager, typically 20% of net investment income above the hurdle rate (income incentive) and 20% of realized capital gains above losses (capital gains incentive). Incentive fees can substantially reduce effective yield to shareholders; always calculate the "all-in" expense ratio including incentive fees.
Income Statement: The financial report showing a company's revenues, costs, and profit (or loss) over a specific period — typically a quarter or year. The income statement's logical flow: Revenue \u2192 Gross Profit \u2192 Operating Income \u2192 Net Income. The "top line" is revenue; the "bottom line" is net income.
Income-Driven Repayment: Federal student-loan repayment plans that set your monthly payment from your income and family size rather than your balance, and forgive any remaining balance after a set number of years. Plan names and terms change often, so confirm current options at studentaid.gov.
Incremental Borrowing Rate: The interest rate a lessee would pay to borrow, on similar terms and with similar security, the funds needed to buy the leased asset. Under ASC 842 and IFRS 16 it is the usual discount rate for measuring lease liabilities, because the rate implicit in the lease is rarely knowable by the tenant. A higher assumed rate shrinks the reported liability, so analysts compare it to the company's bond yields.
Indenture: The legal contract governing a bond issuance, detailing the terms between the borrower and bondholders — interest rate, maturity, covenants, call provisions, events of default, and the trustee's role. The indenture is the bondholder's primary legal protection and the first document a credit analyst reads when evaluating a new issue.
Independence and Objectivity: A conduct standard requiring an analyst's conclusions to be shaped by the evidence rather than by what someone with a stake in the answer wants the conclusion to be. Independence is structural (no banking, lending, ownership, or compensation tie that pulls toward a particular view); objectivity is procedural (the same conclusion would be reached regardless of which side of the trade would benefit). Both are continua, not switches — and the disclosure block at the bottom of a research report is the firm's compressed statement of where on those continua the report sits. Read it first.
Index Fund: A fund that tracks a market index like the S&P 500 by holding all (or most) of the stocks in that index. Index funds offer broad market exposure with very low fees, and consistently outperform most actively managed funds over the long run.
Index Reconstitution: The periodic addition and removal of stocks from a benchmark index — such as the Russell 2000 rebalancing every June. Stocks added to an index face buying pressure as passive funds must purchase them; stocks removed face selling pressure. Index reconstitution effects are well-documented and create predictable short-term price distortions that active investors can trade around.
Indication of Interest: IOI. A non-binding bid letter submitted by a first-round bidder in an M&A auction stating an indicative price range, key conditions (financing, regulatory, diligence requirements), and timing. IOIs are NOT contractually binding but anchor the seller's decision about which bidders advance to the second round. Bidders that lowball in IOIs often get cut; bidders that overstate then walk away in the second round damage their reputation for future processes.
Indifference Frontier: The combination of values of the load-bearing inputs at which a model's intrinsic-value output equals the current market price. The frontier converts \"is the model right?\" into \"which side of this line do I believe?\" -- the latter is a decision an analyst can actually make, while the former invites endless tinkering. Most useful in two-variable sensitivity tables on the dominant pair of inputs; in higher-dimensional models the frontier becomes a surface but is still the conceptual object that frames the decision.
Indirect Method: The most common format for the cash flow statement, starting from net income and working backwards to operating cash flow by adjusting for non-cash items (like D&A) and changes in working capital. Easier to prepare, and the standard in most company filings.
Industry: The THIRD level of GICS classification (Sector, then Industry Group, then Industry, then Sub-Industry). There are 74 industries beneath the 25 industry groups and 11 sectors. For example, the Information Technology sector contains the Technology Hardware & Equipment industry group, the Semiconductors & Semiconductor Equipment industry group, and the Software & Services industry group. Industry-level peer comparison is more meaningful than sector-level for valuation.
Industry Rivalry: The intensity of competition between existing firms in an industry. High rivalry compresses margins through price competition, marketing wars, and capacity races (the airline industry's history is the textbook case). Low rivalry preserves margins through differentiated products, capacity discipline, or oligopolistic restraint. Number of competitors, growth rate, fixed-cost intensity, and exit barriers all drive rivalry.
Inflation: A general increase in prices that reduces purchasing power \u2014 a dollar buys less than it did before. The Fed targets 2% annually. Above 3% persistently usually triggers rate hikes, which slow borrowing and cool the economy. Bad for bond prices, but stock effects depend on whether earnings keep pace.
Inflation Breakeven: The implied inflation rate embedded in the gap between a nominal Treasury yield and a Treasury Inflation-Protected Security (TIPS) yield of the same maturity. Computed as nominal yield minus real (TIPS) yield. In a frictionless market, the breakeven would equal expected inflation; in practice, it is biased downward by the TIPS liquidity premium and upward by the inflation risk premium nominal-bond holders charge. The two adjustments partially offset, so realized inflation can diverge from breakevens by meaningful margins. The most-cited market-based inflation expectation indicator.
Inflation Expectations: What households, businesses, and investors believe inflation will be in the future — and a force that can make inflation self-fulfilling. If people expect prices to keep rising fast, workers demand bigger raises, firms raise prices preemptively, and lenders charge higher interest, all of which actually cause inflation to persist. Keeping expectations "anchored" (the public confident prices will stay stable) is one of a central bank's most important jobs, because anchored expectations let it control inflation with far less economic pain.
Inflation Hedge: An investment that tends to maintain or increase its real purchasing power during periods of rising prices. Real estate, commodities, and TIPS are classic inflation hedges because their values or income streams rise with inflation. Bonds and cash are poor inflation hedges.
Inflation-Linked Revenue: Revenue streams whose price escalators are contractually tied to a consumer price index, a wholesale price index, or a regulated tariff formula. Common in infrastructure (CPI-escalator tariffs in concession agreements), in TIPS (Treasury Inflation-Protected Securities), and in some commercial real-estate leases. Distinct from inflation-CORRELATED revenue (which moves with the economy but lacks contractual escalators).
Information Asymmetry: Any market situation where one party knows more than the other about the product being transacted — Akerlof's 1970 "Market for Lemons" paper formalized this for used cars. Drives adverse selection (lemons drive out peaches), moral hazard (insured driver takes more risk than an uninsured one would), and the principal-agent problem (manager knows more about the firm than shareholders do). The dominant frame for modern microeconomic theory.
Information Asymmetry Premium: The discount investors demand on new equity issuances to compensate for the adverse-selection risk that managers know more about the firm's true value than the market does. Typically 10-25% for a public seasoned equity offering and 30-50% for an IPO; under pecking-order theory, this premium is exactly why managers treat equity as a last resort. The premium can be reduced (but not eliminated) by signaling devices like rights issues, PIPE deals with diligent strategic investors, and pre-issuance disclosure.
Information Ratio: A measure of active portfolio management skill: the annualized active return (versus benchmark) divided by tracking error. An information ratio above 0.50 is considered good; above 1.0 is excellent and rare. It measures how efficiently a manager converts active risk into excess returns.
Infrastructure Investment: An allocation to physical, capital-intensive, often-regulated assets that produce long-duration cash flows: toll roads, regulated utilities, airports, ports, pipelines, communication towers, renewable-energy projects. Distinguished from defensive equities by explicit inflation-linkage in revenue (CPI-escalator clauses in concession agreements or regulated tariffs). Listed via funds like BIP/BIPC/NEE/AMT; institutional unlisted vehicles add greenfield development exposure.
Initial Margin: The upfront deposit required to open a futures or options position, acting as collateral against potential losses. Typically set at 5 to 15 percent of the total contract value, creating significant leverage. Initial margin requirements increase during volatile market conditions to protect against larger potential losses.
Initial Public Offering: The first time a private company sells shares to the public on a stock exchange. An IPO raises growth capital and allows early investors to partially exit. The company files an S-1 with the SEC, roadshows to institutional investors, and prices shares the night before trading begins.
Insider Cluster Buy: A pattern where multiple insiders at the same company — officers, directors, or large holders — purchase shares within a short window. Cluster buys carry more signal than a single isolated purchase because they require several informed parties to independently conclude the stock is cheap. Oxford Ledge surfaces cluster patterns rather than individual trades to reduce noise.
Insider Trading: Buying or selling shares by people inside the company — officers, directors, 10%+ shareholders. Legal trades are reported on Form 4 within 2 business days; illegal insider trading involves trading on material non-public information.
Institutional Holder: An investment manager subject to 13F reporting because qualifying-asset value exceeds the $100M SEC threshold. Includes hedge funds, mutual funds, pension funds, sovereign wealth funds, university endowments, and bank trust departments. Institutional ownership concentration is a stock characteristic readable from the aggregate 13F data: SPY-class blue chips often have 70%+ institutional ownership; thinly-traded smallcaps may have under 30%.
Institutional Investors: Large professional money managers -- mutual funds, pension funds, hedge funds, endowments -- that invest on behalf of others. Managers overseeing more than $100M must disclose their U.S. stock holdings each quarter in SEC 13F filings, which is how platforms can show you which funds own a stock.
Insurance Expense Ratio: For a property-and-casualty insurer, the share of premium consumed by the cost of running the business -- commissions to agents and brokers, underwriting salaries, and general overhead -- as a percentage. It is the smaller of the two components of the combined ratio (the loss ratio being the larger). A lower expense ratio signals operating efficiency and scale, and it is one of the clearest levers a well-run insurer pulls to stay profitable when loss costs rise. (Distinct from a fund's expense ratio, which is an asset-management fee.)
Intangible Asset: A non-physical asset with economic value — patents, trademarks, customer relationships, software, brand names. Unlike tangible assets, intangibles are often excluded from liquidation value calculations but can drive enormous shareholder returns.
Integration Capstone: The terminal practitioner discipline that knits the prior path-specific instruments (financial-statement reading, valuation, risk, behavior, sizing) into a single coherent practice through a sequence of full-case workflows. The capstone is not new content; it is the integration layer that converts content into practice. Its purpose is to send the learner back to the foundation paths with a sharper eye, not to replace those paths.
Interest Coverage: EBITDA (or EBIT) divided by interest expense. EBITDA/Interest is the standard measure; EBIT/Interest is stricter (deducts D&A). Above 4x is comfortable, below 1.5x signals distress.
Interest Coverage Ratio: EBIT (or EBITDA) divided by interest expense — how many times operating earnings cover the interest bill. Below 2x is concerning; below 1.5x is a distress signal. Lenders use this metric to set debt covenants and determine a company's maximum safe borrowing level.
Interest Expense: The cost of borrowing money — what a company pays lenders for loans, bonds, and credit lines. Interest expense reduces taxable income (which is why debt is called "tax-advantaged" relative to equity). High interest expense relative to operating income signals financial fragility: in a downturn, the company may struggle to cover its debt service.
Interest Rate Cap: A strip of caplets -- European call options on a floating reference rate (typically SOFR or a LIBOR successor) at each reset date during the contract life. Each caplet pays the difference between the reference rate and the cap strike when the rate exceeds the strike on a reset date, calculated against the notional. The total cap premium is paid upfront and is non-refundable; the cap pays out only when the floating rate exceeds the strike. Caps are the cleanest insurance against rising rates for any floating-rate borrower and are widely used in commercial real estate and large corporate finance.
Interest Rate Floor: A strip of floorlets -- European put options on a floating reference rate. Each floorlet pays the difference when the rate falls below the floor strike on a reset date. Floors are the mirror image of caps and are used by floating-rate lenders or holders of floating-rate assets to bound minimum yield. Embedded floors are common inside structured deposit products and floating-rate bond funds, where the issuer guarantees a minimum coupon by buying a floor in the wholesale market.
Interest Rate Swap: A contract where two parties exchange interest payments — typically one pays fixed rate while the other pays floating rate (like SOFR) on the same notional principal. Used by companies to convert floating-rate debt to fixed, providing certainty about future interest costs.
Internal Controls: The policies, procedures, and safeguards that protect a company's assets, ensure the reliability of financial reporting, and promote operational efficiency and compliance. Strong internal controls make fraud and accounting errors less likely to occur or go undetected.
Internal Rate of Return: IRR — the discount rate that makes the net present value of an investment's cash flows equal to zero; equivalently, the geometric annualized return earned. For a single-investment / single-exit deal: IRR = (Exit Equity / Entry Equity)^(1/years) − 1. For multi-period cash flows, solved numerically. PE sponsors target 20%+ IRRs net of fees; venture funds 25%+; public equity long-term ~10%. Highly sensitive to exit timing.
International Diversification: Spreading investments across multiple countries and regions to reduce exposure to any single economy, currency, or regulatory regime. A globally diversified portfolio roughly matching MSCI ACWI weights includes approximately 60% US and 40% non-US equities. International diversification lowers portfolio volatility when home and foreign markets are not perfectly correlated.
Intertemporal Choice: Any decision that trades off consumption or value across different time periods -- save versus spend today, retire early versus late, attend college now versus work first. The two-period consumption-savings model is the simplest formal framework: a household balances current consumption against future consumption subject to a budget constraint, with the optimal mix determined by the interest rate and the rate of time preference. All retirement planning, college-savings, and lifecycle-allocation frameworks are extensions of this core trade-off.
Intrinsic Value: An estimate of what a stock is truly worth based on its fundamentals \u2014 earnings, cash flow, growth prospects, and risk. Compare intrinsic value to the market price to spot potential bargains or overpriced stocks. The art of investing is estimating this accurately.
Intrinsic Value (Options): The immediate exercise value of an option — for a call, the amount the stock price exceeds the strike; for a put, the amount the strike exceeds the stock price. An option's total price = intrinsic value + time value. OTM options have zero intrinsic value.
Inventory Days: The translation of the inventory balance-sheet line into days, computed as inventory divided by daily cost of goods sold. Same concept as Days Inventory Outstanding (DIO). Reading inventory in days rather than dollars eliminates the scale problem — a $200M inventory balance is unremarkable for a $4B-revenue retailer (about 30 days at typical retail COGS) and alarming for a $400M-revenue specialty business (180 days, suggesting either a demand slowdown the income statement has not yet booked or a deliberate pre-build for a known seasonal peak). Rising inventory days over multiple quarters is one of the earliest leading indicators of revenue weakness.
Inverse ETF: An exchange-traded fund designed to deliver the opposite of its benchmark's daily return. An inverse S&P 500 ETF gains 1% when the index falls 1%. Used as a hedging tool or short-term tactical bet. Leveraged inverse ETFs (2x, 3x) experience significant value decay when held longer than one day due to daily rebalancing.
Inverted Yield Curve: A yield curve where short-term rates are higher than long-term rates \u2014 the opposite of the normal upward-sloping shape. Has preceded every US recession in the last 60 years, typically by 6 to 24 months. Markets price the curve this way when they expect future short-term rates to FALL, usually because the Fed is expected to cut in response to a slowing economy.
Invested Capital: The dollar capital tied up in a business's operations -- typically calculated as net working capital plus net property/plant/equipment plus other operating long-term assets, or equivalently as total equity plus interest-bearing debt minus excess cash. Invested capital is the denominator of ROIC and the base on which WACC is charged. Different practitioners use slightly different definitions (lease capitalization, goodwill treatment, R&D capitalization), but the principle is the same: measure the capital the business actually employs to generate operating profit.
Investing Activities: The section of the cash flow statement showing cash spent on or received from long-term investments — buying/selling equipment (capex), acquiring businesses, or buying/selling investment securities. Negative investing cash flow often means the company is investing in future growth.
Investment Committee: The group inside an institutional investor (or, for personal investing, a trusted reader or partner) that reviews and approves a pitch before capital is deployed. The committee exists to surface risks and sizing problems the analyst missed, NOT to rubber-stamp ideas the analyst already believes. A retail equivalent is one or two senior readers who agree to be honest about thesis weaknesses; the most important thing the committee does is reject ideas the analyst is too close to.
Investment Grade: Bonds rated BBB− or higher by S&P (Baa3+ by Moody's), considered relatively safe. Many institutional investors can only hold investment-grade bonds, so a downgrade to "junk" can force widespread selling and a sharp price drop.
Investment Memo: A long-form written investment argument committed to paper, following the genre's standard six-section pattern (thesis, business description, financial summary, valuation, catalysts, risks and downside case). The artifact serves two roles for a lifelong investor: a structured reading frame for sell-side product and hedge-fund letters, and a writing discipline for their own personal investment journal where committing a thesis to a one-page memo separates real conviction from narrative.
Investment Policy Statement (IPS): The written document that governs portfolio decisions for a client. A commitment device against in-the-moment behavioral mistakes during drawdowns or euphoric markets. Six standard sections (the "RR-LTLU" mnemonic): Return objectives, Risk tolerance, Liquidity needs, Time horizon, Tax + legal constraints, and Unique circumstances. A complete IPS also includes an explicit rebalancing-policy clause (trigger + tolerance band + tax-awareness) and a "when to revise" section that separates life-event-driven revisions from market-driven (which should NOT trigger a revision). Good IPSs are 1-3 pages, re-read at every quarterly review, and survive a market crisis intact. Advisors should write IPSs for themselves before they write them for clients.
Investment Rating: A BDC's internal credit grade assigned to each portfolio company, typically on a 1\u20134 or 1\u20135 scale. Lower ratings indicate higher default risk. Rating 1 is usually "performing above expectations"; the lowest rating signals imminent loss. Most BDCs disclose the weighted-average rating and the percentage of assets rated below performing in their 10-Q.
Investment Thesis: A concise written argument for why a security is mispriced and what catalyst will close the gap between price and value. A good thesis states the edge, the expected return, and the conditions under which the thesis is wrong. Investors who cannot write their thesis in three sentences often do not understand it well enough to hold through volatility.
IORB: Interest on Reserve Balances -- the rate the Federal Reserve pays banks on the reserves they hold at the Fed. Since 2008 the Fed has used IORB as the FLOOR of the short-rate complex: a bank will not lend reserves into fed funds, repo, or T-bills at a rate meaningfully below IORB because it can simply earn IORB at the Fed risk-free. Adjusting IORB is the primary lever the Fed pulls to move the policy rate in the modern ample-reserves regime, replacing pre-2008 quantity-of-reserves operations.
IPO Allocation: The decision by IPO underwriters about which institutional accounts receive shares at the offer price and in what size. In oversubscribed deals, allocation favors accounts that pay the underwriters the most in trading commissions over time -- the largest institutional funds and frequent IPO buyers. Retail investors typically receive zero allocation and must buy in the open market on day one, AFTER the first-day pop, which is why retail rarely captures the headline IPO returns.
IRA Buyback Excise Tax: The 1% federal excise tax on the fair-market value of corporate stock repurchases imposed by the Inflation Reduction Act of 2022, effective for buybacks executed after 2022. Projected to raise about $74B over 10 years. Empirically (early 2023-2024 data), the 1% rate is a small drag relative to the EPS lift buybacks generate, and the policy has not produced a meaningful shift back toward dividends. A higher proposed rate (4%) would have changed the calculus; the 1% rate is closer to a rounding error.
IRR: Internal Rate of Return — the discount rate at which a project's NPV equals zero. Intuitive because it expresses return as a percentage, but flawed: IRR implicitly assumes interim cash flows are reinvested at IRR itself (often unrealistic), can produce multiple values when cash-flow signs flip, and ranks mutually exclusive projects incorrectly when scales differ. Use IRR as a sense-check, not a decision rule.
ISM PMI: Purchasing Managers Index — a monthly survey of manufacturing and services activity compiled by the Institute for Supply Management. A reading above 50 signals expansion; below 50 signals contraction. It is released early each month, making it one of the most-watched leading indicators of economic direction.
Issuer-Paid Research: A research report a company itself commissions and pays an outside firm to publish about it, typically on a quarterly retainer of a few thousand to tens of thousands of dollars. Ratings cluster heavily at "Buy" or "Outperform" because coverage continues only so long as the issuer finds the work acceptable. Treat it as a structured fact sheet from the company packaged as an opinion: usable for understanding the bull case management wants emphasized, not as an independent rating, and never a basis for a position without independent verification.
Item 1.01: The 8-K item number for Entry into a Material Definitive Agreement. Used when a public company signs a material contract -- most commonly M&A deals, large customer agreements, financing arrangements, or asset-purchase contracts. The actual contract is typically attached as an exhibit (where the substantive terms live); the cover-page disclosure is short and PR-vetted.
Item 2.01 (Acquisition or Disposition): The 8-K item code for "Completion of Acquisition or Disposition of Assets" — disclosed when a company finalizes a material M&A deal or divestiture. Item 2.01 filings include the deal's effective date, counterparty, total consideration, and how it was financed (cash, stock, or debt). Required within 4 business days of close.
Item 2.06 (Material Impairment): The 8-K item code for "Material Impairments" — disclosed when a company concludes a material charge is required to write down the value of an asset (goodwill, inventory, intangibles, property/plant/equipment, or investments). Item 2.06 must include the estimated charge amount, the asset class affected, and whether it will result in future cash expenditures. Goodwill impairments are the most common kind and signal that a prior acquisition destroyed value.
Item 4.01 (Auditor Change): The 8-K item code for "Changes in Registrant's Certifying Accountant" — disclosed when a company switches its external auditor. Item 4.01 must state whether there were any "disagreements" with the prior auditor on accounting principles or financial statement disclosures. A switch from a Big Four firm to a smaller regional firm, or a mid-year change, is often a precursor to accounting problems.
Item 4.02: The 8-K item number for 'Non-Reliance on Previously Issued Financial Statements or a Related Audit Report.' Filing an Item 4.02 8-K is the SEC's pre-restatement signal -- the company is telling investors not to rely on prior financials, and a 10-K/A or 10-Q/A restatement filing is near-certain to follow. One of the highest-signal disclosures in the form-8-K taxonomy.
Item 5.02: The 8-K item number for 'Departure or Appointment of Directors / Principal Officers.' Used when a CEO, CFO, or board member departs or is appointed. The associated exhibits often include separation agreements, severance terms, and the new officer's employment agreement -- where the substantive details live beyond the brief 8-K cover page.
Item 5.02 (Executive Change): The 8-K item code for "Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers" — disclosed when a CEO, CFO, or other named executive officer joins, leaves, or has their compensation materially changed. The body usually specifies the role, the person's name, and an effective date. CFO and CEO changes within 90 days of an earnings miss are statistically associated with restatement risk.
Iterative WACC: The convergence problem in cost-of-capital modeling when the target capital structure is itself a model output (e.g., LBO debt paydown schedule). The discount rate depends on capital structure; capital structure depends on projected free cash flow; free cash flow depends on the discount rate. Practitioners resolve this either by (a) using a single fixed long-run target D/E (simplest, defensible for steady-state firms) or (b) building a year-by-year WACC schedule that re-levers beta against the projected D/E in each forecast year (most rigorous; common in LBO models). The cleanest workaround is APV valuation, which sidesteps the WACC circularity by valuing the unlevered firm and tax shields separately.
IV Crush: The abrupt collapse in an option's implied volatility once a scheduled, binary event resolves -- most commonly an earnings report, but also an FDA decision, a court ruling, or a regulatory vote. Before the event the market bids implied volatility up because a large move is expected and its direction is unknown; the moment the news lands, that uncertainty is gone and implied volatility falls back toward its ordinary level, often by tens of percentage points in a single session. Vega translates the fall into dollars, and on a short-dated at-the-money contract the vega loss routinely exceeds the delta gain from the move itself. This is why a buyer can call the direction correctly, watch the stock gap their way, and still find the option worth far less than it cost: they paid peak retail for a volatility component with a known expiry date.
IV Rank: A normalized reading that places an option's current implied volatility against its own recent range, usually the past year, and expresses the result on a 0-to-100 scale. A reading near 100 means implied volatility is at the top of its own historical band; a reading near 0 means it is at the bottom. The value of the measure is that it answers "expensive relative to what" without comparing across unrelated tickers -- a quiet utility and a volatile biotech have very different absolute volatility levels but the same 0-to-100 scale. It is a context reading, not a signal: a high rank often reflects a genuine reason for elevated uncertainty, and a low rank can persist for a long time.

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