SPY calls expiring that date in the strikes we track traded 1.1x their open interest, by 09:37 ET on Oct 29, 2026. Tracked: up to 40 strikes around the money across 35 expirations.
CStrike8.0x
Expiry1.1x
Evidence
The numbers behind this snapshot, Oct 29, 2026, 09:37 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
8.0x
Volume / prior open interest, the expiry's tracked strikes
1.1x
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: 1.05; Ratio: 8.04
Contracts traded behind each figure
Expiry calls: 35
Baseline
this expiry's call volume/open interest, same session: 1.05
Baseline window
same expiry, same session (n = strikes with open interest)
The median is SPY's call/put volume ratio for contracts within a week over the last 15 sessions. 9,450 call and 5,850 put contracts by 10:02 ET on Oct 29, 2026. Tracked: up to 40 strikes around the money across 35 expirations.
The median is SPY's put/call volume ratio for contracts 1 to 3 months out over the last 15 sessions. 6,178 put and 1,419 call contracts by 09:37 ET on Oct 29, 2026. Tracked: up to 40 strikes around the money across 35 expirations.
Within 3 weeks: 189,888 put and 146,073 call contracts. 1 to 3 months out: 9,479 put and 2,720 call contracts. By 09:37 ET on Oct 29, 2026. Tracked: up to 40 strikes around the money across 35 expirations.