SPY 778 calls expiring Oct 13 (same day) traded 11.9x their open interest
As of , published from Oct 13, 2026, 10:27 ET. Source: Schwab options chain.
SPY calls expiring that date in the strikes we track traded 3.9x their open interest, by 10:12 ET on Oct 13, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
CStrike11.9x
Expiry3.9x
Evidence
The numbers behind this snapshot, Oct 13, 2026, 10:12 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
11.9x
Volume / prior open interest, the expiry's tracked strikes
3.9x
Days to expiry
0
Why it fired
Rule
volume/prior OI >= 5.0 and >= 3.0 x this expiry's call volume/OI; prior OI >= 1000; volume >= 2000
Values that cleared it
Expiry ratio: 3.93; Ratio: 11.87
Contracts traded behind each figure
Expiry calls: 38
Baseline
this expiry's call volume/open interest, same session: 3.93
Baseline window
same expiry, same session (n = strikes with open interest)
5,332 put and 1,285 call contracts by 09:42 ET on Oct 13, 2026. Est. premium $2.2M puts, $791K calls. Tracked: up to 40 strikes around the money across 34 expirations.
5,675 put and 1,880 call contracts by 09:32 ET on Oct 13, 2026. Est. premium $1.1M puts, $413K calls. Tracked: up to 40 strikes around the money across 34 expirations.