Coinbase's US500 futures contract hit a $104 million trailing 24-hour volume peak in its launch week, then showed just $7.22 million in a later snapshot. The gap leaves the real test ahead: whether volume, open interest, and liquidity hold up once the launch buzz fades.
Coinbase US500 futures began trading on Aug. 17, and Brian Armstrong's Aug. 28 post tracked trailing 24-hour matched volume that peaked at $104 million near Aug. 25-26, after lower readings through most of the contract's first week. Roughly 15 hours later, Coinbase's product page showed $7.22 million in 24-hour volume and $3.01 million in open interest, with funding at negative 0.0001% and shorts paying longs.
Volume drops after the launch spike
The two readings cover different rolling windows, so the later number does not reverse the earlier one — together they place the launch headline in context. At the later reading, $7.22 million in 24-hour volume ran about 2.4 times the $3.01 million in open interest, a snapshot of scale rather than a count of traders or capital. Repeat volume through ordinary sessions, and open interest holding or rising across multiple days, would show that trading survived the launch window.
A crypto funding mechanism inside a regulated contract
Coinbase built US500 as a five-year, cash-settled futures contract, defined in a July 30 self-certification filed with the CFTC. The initial contract expires the third Thursday of December 2030, clears through Nodal Clear, and settles in cash rather than delivering shares. Coinbase Derivatives calculates the funding rate hourly from the gap between futures and spot marks, then applies it through cash adjustments at midday and end-of-day margin runs. Trading runs Sunday 8 p.m. Eastern Time to Friday 5 p.m. Eastern Time, not around the clock.
Why US500 isn't the S&P 500
US500 references the MarketVector Top 500 US Profitable Companies Continuous Index, a benchmark that began Aug. 7 and listed 501 components at its Aug. 28 reading. That separate provider and methodology distinguish US500 from the S&P 500: traders get cash-settled exposure to MarketVector's index, not a tokenized basket of S&P 500 shares.
The $104 million figure shows traders tested the contract, but the launch-week peak alone does not show whether they kept using it once the opening burst faded.
Source: CryptoSlate
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