MSFT 532.5 calls expiring Oct 9 (same day) traded 5.3x their open interest
As of , published from Oct 9, 2026, 10:38 ET. Source: Schwab options chain.
MSFT calls expiring that date in the strikes we track traded 0.7x their open interest, by 10:23 ET on Oct 9, 2026. Tracked: up to 40 strikes around the money across 23 expirations.
CStrike5.3x
Expiry0.72x
Evidence
The numbers behind this snapshot, Oct 9, 2026, 10:23 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
5.3x
Volume / prior open interest, the expiry's tracked strikes
0.72x
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: 0.72; Ratio: 5.32
Contracts traded behind each figure
Expiry calls: 37
Baseline
this expiry's call volume/open interest, same session: 0.72
Baseline window
same expiry, same session (n = strikes with open interest)
3,324 call and 1,328 put contracts by 12:43 ET on Oct 9, 2026. Est. premium $4.8M calls, $873K puts. Tracked: up to 40 strikes around the money across 23 expirations.
2,609 call and 616 put contracts by 10:23 ET on Oct 9, 2026. Est. premium $1.9M calls, $358K puts. Tracked: up to 40 strikes around the money across 23 expirations.