BackQuant Glossary
0DTE
Zero days to expiration. An option that expires the same trading day. 0DTE options have the highest gamma per unit of time, so dealer hedging flows on 0DTE positions can move spot violently in the final hours before settlement. Common on Deribit weeklies and on equity index options.
Related terms
Dealer Hedging
The act of buying or selling the underlying to offset directional exposure created by an options book. Dealers stay delta-neutral by trading spot or perpetuals as price moves. Dealer hedging is the mechanical force behind gamma exposure effects, pinning, and OpEx flows.
Deribit
The dominant crypto options exchange, holding the majority of global BTC and ETH options open interest. Deribit standard expiries settle Friday at 08:00 UTC. The DVOL and ETH DVOL volatility indices are calculated from Deribit option prices.
Gamma
A second-order Greek measuring how much delta changes per one-dollar move in the underlying. Gamma is highest for at-the-money options near expiry. Long option positions are always long gamma; short options are short gamma. Gamma is the input to gamma exposure.
Settlement
The expiry-time process by which an option pays out its final intrinsic value. On Deribit, settlement occurs at 08:00 UTC using a half-hour time-weighted average of the index price. Settlement is the moment dealer hedging flows release.
Spot
The current cash market price of an asset for immediate delivery. Spot is the underlying reference for derivatives pricing. Crypto spot trades 24/7 across hundreds of venues, with index prices aggregating across the deepest ones.
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