OKX published two derivatives updates that both sit in the “market plumbing” layer, the part traders notice most during expiries, conversions, and fast markets.
First, OKX said it will shorten the averaging window used to calculate delivery, exercise, and settlement prices for expiring contracts. Second, OKX said it would convert OPN pre-market futures into a standard perpetual contract, carrying positions and market data over into the normal perp regime.
In an OKX trading update published March 6, OKX said that from March 18, 2026, delivery price, exercise price, and settlement price will be calculated as the average of index prices over the last 30 minutes before expiration, with one price point recorded every 200 milliseconds.
That replaces the prior baseline method described in OKX’s delivery and exercise rules, which states that OKX calculates delivery or exercise price using the average of index prices over the last hour before expiration, also sampled every 200 milliseconds.
OKX also said that any calculations relying on those averaged prices, including Delta decay and related parameters, will be updated accordingly.
Averaging windows shape incentives.
A longer window can dilute the impact of a single short-lived spike, but it also extends the time during which aggressive traders can attempt to influence pricing around expiry. A shorter window concentrates the settlement “sensitivity” into a narrower period. That tends to matter most when liquidity thins late in the session, or when a contract is close to a high-interest strike cluster where hedging flows are heavy.
The practical effect is that the last 30 minutes before expiration becomes a more important liquidity and execution zone on OKX for expiry futures and options. For market makers, that can mean tighter risk controls around the expiry window and more emphasis on index-following execution quality.
In a separate OKX announcement published March 6, OKX said OPN premarket futures would be converted to standard perpetual futures during a one-hour window, 07:00 to 08:00 UTC on March 06, 2026.
OKX’s contract listing details for the standard OPN perpetual include:
All of those specifications are included on the conversion notice.
The key user-facing detail is that OKX treats these conversions as a continuity event, not a forced close.
Pre-market positions and open orders are carried over to the converted standard perpetual, with open orders remaining valid through and after the conversion process. The pre-market product rule also notes that certain market protection parameters shift to standard-perp behavior after conversion, including price-limit calculation frequency.
In plain terms, the “pre-market” phase is price discovery with special mechanics, while the “standard perp” phase plugs the contract into normal perpetual futures conventions such as ongoing funding and tighter, higher-frequency risk parameters.
These two updates hit different parts of the derivatives stack, but they interact with the same core variables: liquidity, hedging behavior, and execution timing.
Expiry traders: For expiry futures and options, the shift from a one-hour to a 30-minute average compresses the settlement-critical period. Traders who manage expiry exposure, pin risk, or gamma hedges tend to care about how much price action “counts” into settlement. With the new window, late moves have a larger marginal influence on the final average, simply because there are fewer minutes to dilute them.
OPN perp traders: For OPN, the conversion is less about a new contract and more about a new regime. Traders typically watch three things around a pre-market to standard conversion: how the mark price behaves during the handoff, whether early liquidity deepens once standard perps go live, and how funding prints once it applies under the standard contract schedule.
For users, the simplest action is operational: after the conversion window, re-check position details, margin settings, and any API handling that depends on instrument identifiers or contract status, especially if trading systems treat “pre-market” and “standard” contracts differently.
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