Cboe reports 24.2m daily 0DTE contracts, but its Q3 totals need reconciliation

Cboe’s 19 October review puts US options average daily volume at 70.6 million contracts in the third quarter, down 4% from the second quarter. It reports 24.2 million daily contracts expiring that day, commonly called zero-days-to-expiry or 0DTE options. The source’s own totals require qualification.[1]

Two arithmetic checks change the presentation

The three product-category figures add to 67.1 million, leaving a 3.5 million difference from the 70.6 million headline. Separately, 24.2 ÷ 70.6 equals 34.3%, while 24.2 ÷ 67.1 equals 36.1%. The latter is close to Cboe’s stated 36%, but that numerical fit is not evidence that 67.1 million was the intended denominator.[1]

The figures are reproduced as attributed source observations, with the inconsistency exposed rather than silently corrected. No explanation establishing a common denominator was identified in the inspected commentary. A revised report or underlying dataset would be needed to settle it.[1]

Expiry and product category measure different things

0DTE volume cuts across stocks, ETFs and indices; it is not an additional product category to add to those three totals. Similarly, a share of traded contracts does not measure a share of customer assets, premiums paid or outstanding positions. Differences in contract size and repeated turnover make those quantities economically different.

The reported direction still suggests that ETF activity held up better than single-stock activity during the quarter. It does not show that every ETF contract was liquid, that 0DTE strategies were profitable or that the count of individual participants increased. Those conclusions would require different evidence.

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