SPY · OCT 12Session closed

Same-day contracts accounted for 70% of tracked SPY option volume by 09:32 ET

As of Oct 12, 2026, 09:32 ET, published from Oct 12, 2026, 09:47 ET. Source: Schwab options chain.

62,601 of 89,969 tracked contracts on Oct 12, 2026, puts 30,306 and calls 32,295. Tracked: up to 40 strikes around the money across 33 expirations.

Evidence

Rule: same-day share >= 0.6 (absolute: baseline n 0 < 5); volume >= 10000
Values that cleared it: Share: 0.6958
Contracts traded behind each figure: Same day calls: 27; Same day puts: 28; Ticker: 647
Baseline: median same-day share of option volume: not set yet
Baseline window: last 20 sessions
Baseline n: 0, so the fixed threshold applied
Claim level: 1, arithmetic on reported figures

SPYP779OCT 12Volume vs open interest
09:48 ET
SPY 779 puts expiring Oct 12 (same day) traded 5.8x their open interest
SPY puts expiring that date in the strikes we track traded 1.9x their open interest, by 09:48 ET on Oct 12, 2026. Tracked: up to 40 strikes around the money across 33 expirations.
Source: Schwab options chainSPY page Details
SPYPOCT 16Put/call by expiry
09:37 ET
SPY puts expiring Oct 16 traded 2.6x the calls on that date
15,303 put and 5,926 call contracts by 09:37 ET on Oct 12, 2026. Est. premium $2.3M puts, $2.0M calls. Tracked: up to 40 strikes around the money across 33 expirations.
Source: Schwab options chainSPY page Details