A–C

ADL (auto-deleveraging): venue mechanism that reduces opposing profitable positions when liquidations overwhelm insurance backstops. Not present on every venue; design details differ. ATM (at-the-money): option whose strike is near the current reference price (spot, index, or forward — check which). Slightly different ATM definitions change which contract carries the highest gamma.

Backwardation (vol): front-tenor implied volatility higher than back-tenor — common around near events. Basis: difference between spot (or inventory) and a futures/perp-implied price; core object of cash-and-carry research. Bid/ask spread: difference between best buy and sell quotes; wide spreads inflate “IV paid” optics on tape.

Call: contract giving long side bullish convexity via right to buy or cash-settled equivalent. Combo / strategy order: multi-leg package traded as one price when the venue supports it. Contango (vol): back-tenor IV higher than front in a calmer term structure. Covered call: long inventory plus short call — upside sold for premium. Credit spread: vertical that collects net premium with defined width risk.

D–F

Debit spread: vertical that pays net premium for defined-risk directional convexity. Delta: first-order sensitivity of option value to underlying price; also a rough hedge ratio. Desk (OptionsMatch): a terminal surface such as chain, GEX, term, skew, tape, or basis under /t/{asset}/….

Divergence: cross-venue disagreement in marks, IV, or related metrics — research signal, not automatic arbitrage. European-style: exercise typically only at expiry (common in crypto cash-settled listed options; always verify product rules).

Expected move: rough distribution width implied by IV to expiry; long premium needs realized move or vol repricing beyond what was paid. Expiry / settlement: time and method that fix final payoff; index definition matters as much as the clock. Extrinsic value: portion of premium beyond intrinsic; decays with theta and changes with IV. Funding: periodic payment between long and short perpetual positions; can dominate short-horizon carry.

G–I

Gamma: sensitivity of delta to underlying moves; highest near ATM and near expiry. GEX (gamma exposure): estimate of dealer hedging pressure from OI and gamma under sign assumptions — model, not inventory feed. See the GEX guide. Greeks: delta, gamma, theta, vega, rho (and variants) summarizing risk sensitivities.

Hedge: trade that offsets primary risk (often delta via perps/futures); imperfect hedges leave residual basis and margin risk. Implied volatility (IV): the vol input that matches a model price to the market price; the market’s pricing language for uncertainty. Index (settlement): reference used to cash-settle options; multi-venue products may not share one index.

Insurance fund: venue pool intended to cover losses beyond liquidated account equity before socialized mechanisms. Intrinsic value: immediate exercise value if applicable (max(S−K,0) for calls, etc., in consistent units). Inverse option/derivative: coin-settled or coin-margined design where P&L units differ from linear stable-settled products. Iron condor: short OTM put spread plus short OTM call spread — defined-risk range structure. ITM / OTM: in-the-money / out-of-the-money relative to the chosen reference price.

J–M

Legging: trading multi-leg structures one option at a time; creates residual risk if incomplete. Limit order: order with a price cap/floor; may not fill. Linear option/derivative: typically stablecoin-settled with more USD-like P&L intuition than inverse designs. Liquidation: forced reduction/close when margin equity fails maintenance under venue rules.

Long premium / short premium: net buyer vs net seller of optionality; short premium collects theta but fears gamma and tails. Maker / taker: provide vs remove liquidity; fee schedules often differ. Mark price: reference used for margin and unrealized P&L — can differ from last trade.

Match layer: OptionsMatch venue/country discovery surfaces (/venue, /countries, /find-venue, compare). Max pain: expiry heuristic strike that would minimize aggregate payout to option holders under a simplified OI snapshot — not a physical magnet. Moneyness: relationship of strike to reference price (ITM/ATM/OTM and continuous measures). Multi-venue: working with more than one options book; offsets rarely span credit islands.

N–R

Naked short: short option without a defining long fence or full inventory cover; theoretically large risk. Notional: economic size scaling; compare across contract multipliers carefully. Open interest (OI): outstanding contracts; feeds walls, max pain, and GEX-style maps. Order book: resting bids and offers; depth determines how painful market orders are.

Perpetual (perp): non-expiring futures-like contract using funding; primary delta hedge tool in crypto. Pin risk: uncertainty and gamma pain when spot sits near a large-OI strike into settlement. Portfolio margin: risk-engine offsets across a book under stress scenarios — capital efficient and model-dependent.

Protective put: long inventory plus long put — insurance overlay. Put: contract with bearish convexity / downside insurance characteristics for the long side. Put/call ratio (PCR): puts divided by calls on volume or OI; blunt sentiment tool. Reverse cash-and-carry: positioning for cheap futures/discounts versus cash. RFQ: request-for-quote workflow for size and multi-leg packages. Rho: sensitivity to interest rate inputs — often secondary in crypto but not always zero in models. Risk reversal (RR): long one wing and short the other (e.g. 25Δ); also a skew quote convention. RV (realized volatility): historical or delivered vol of the underlying path.

S–V

Settlement window: period when expiry fixing is determined; critical for pin risk. Skew: shape of IV across strikes (and sometimes the 25Δ RR summary); put skew bid means downside vol rich relative to upside in common crypto regimes. Spot: cash market price of the asset; may differ from options settlement index.

Spread (structure): multi-leg package such as a vertical; also means bid-ask width in microstructure contexts. Straddle: same-strike call + put. Strangle: OTM call + OTM put at different strikes. Synthetic: combination that mimics another payoff (e.g. synthetic long via long call + short put).

Tape: time sequence of prints; shows what traded, not intent. Term structure: IV across expiries. Theta: time decay of option value, all else equal. Underlying: asset the option references. Vega: sensitivity to IV changes. Venue: exchange or protocol where contracts trade and margin lives. Vertical: same-expiry, same-type, different-strike long/short pair. Vol regime: qualitative state (e.g. crush, expansion) often discussed with GEX sign and realized/IV gaps. VRP (volatility risk premium): tendency of IV to differ from subsequent RV on average — statistical, not a promise.

W–Z and OptionsMatch-specific

Wall (call/put wall): strike with notably large call or put OI (or gamma-weighted OI); focal point for hedging narratives, not a hard barrier. Wing: far OTM strikes relative to ATM; often wider markets and skew-sensitive. Wipeout / max loss: full adverse outcome of a defined structure — size to it, not to best case.

OptionsMatch terminal: research UI under /t/{asset}/… desks. Guides: educational articles including this glossary. Provenance banners: labels such as live, partial, or mock describing data completeness. Soft launch: product mode where access or coverage may be constrained for operational reasons.

If a venue’s legal definition conflicts with this glossary, the venue rulebook wins for your account. Use linked guides (GEX, chain, strategies, risk, multi-venue) for fuller prose; use this A–Z block for dense recall.