SPX 7760 puts expiring Oct 9 traded 7.6x their open interest
As of , published from Oct 8, 2026, 16:12 ET. Source: Schwab options chain.
SPX puts expiring that date in the strikes we track traded 2.5x their open interest, by 15:57 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 55 expirations.
PStrike7.6x
Expiry2.5x
Evidence
The numbers behind this snapshot, Oct 8, 2026, 15:57 ET. Session volume from delayed options chain snapshots, published at least 15 minutes after capture. Totals cover the strikes captured around the money, not every listed strike. Not individual trades. Premium is an estimate: volume times the quote midpoint.
Measure
Value
Volume / prior open interest, this strike
7.6x
Volume / prior open interest, the expiry's tracked strikes
2.5x
Days to expiry
1
Why it fired
Rule
volume/prior OI >= 5.0 and >= 3.0 x this expiry's put volume/OI; prior OI >= 1000; volume >= 2000
Values that cleared it
Expiry ratio: 2.54; Ratio: 7.64
Contracts traded behind each figure
Expiry puts: 40
Baseline
this expiry's put volume/open interest, same session: 2.54
Baseline window
same expiry, same session (n = strikes with open interest)
Baseline n
40
Claim level
1, arithmetic on reported figures
What happened next
Next settlement: Open interest in SPX 7760 puts expiring Oct 9 rose 1,176 at the Oct 8 settlement.
5,167 put and 1,931 call contracts by 15:57 ET on Oct 8, 2026. Est. premium $161.6M puts, $99.3M calls. Tracked: up to 40 strikes around the money across 55 expirations.