Binance changes US-equity funding calculation after overnight trading disruption

Binance said on 21 October that it would remove an affected period’s premium-index observations from the 08:00 UTC funding calculation for perpetual contracts referencing US equities. It cited intermittent network connectivity at a major US overnight alternative trading system. The notice changes calculation inputs; it does not waive funding.[1]

Separately, Blue Ocean ATS reported that it halted trading after connectivity problems at an external network provider and announced resumption once the problem was resolved. Its published times align with the interval described by Binance. Binance did not identify the ATS in its notice, however, so the two disclosures do not establish a named supplier relationship.[2][1]

Why an equity data problem reaches a crypto account

Binance’s TradFi perpetuals can trade throughout the week, while their underlying markets follow trading sessions and closures. Its pricing documentation therefore combines external data and special calculation modes. During regular hours, the index aggregates vendor prices. Overnight, it smooths the index more gradually to accommodate limited liquidity. During specified closures, equity contracts use a smoothed measure derived from the contract order book instead of relying on a fresh external quote.[3]

These mechanisms separate the availability of a derivative from the availability of a dependable underlying reference. A platform can remain open while the information used to price or finance its contracts is impaired. Continuous access consequently depends on rules for the information entering each calculation.[3]

The premium index measures the relationship between prices available in the perpetual order book and the reference index. Funding uses that relationship to encourage the derivative to stay aligned with its underlying. It is a transfer between holders of opposing positions: a positive rate means longs pay shorts, while a negative rate reverses the direction. Binance’s general funding guide says the exchange does not charge a fee on those funding payments.[4]

The adjustment’s cash effect is contract-specific

The funding amount equals position nominal value multiplied by the funding rate. For an illustrative USDT-settled position with unchanged nominal value of 100,000 USDT, a one-basis-point rate change alters the payment by 10 USDT. This measures sensitivity, not the benefit from this incident. Removing observations need not reduce the payment for every participant: the result depends on the contract’s remaining observations and which side the trader holds.[4]

Funding is also distinct from the mark price used within the contract’s risk machinery. Binance describes separate index and mark-price calculations, including limits on their deviation. The notice does not establish that those prices were reset or that completed executions were reversed. For firms reconciling positions across venues, the specific adjustment belongs in the funding record; a general label such as an outage does not identify every affected ledger entry.[3][1]

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