MSFT · CALLS · OCT 23Settled

Open interest in MSFT calls expiring Oct 23 (2 weeks out) rose 17,834 at the Oct 6 settlement

As of Oct 6, 2026 settlement. Source: Cboe settlement open interest archive.

36,379 to 54,213 contracts between the Oct 5 and Oct 6 settlements, 49% of the prior figure.

Evidence

The numbers behind this snapshot, Oct 6, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.
Measure	Value
Open interest, earlier settlement	36,379
Open interest, later settlement	54,213
Change (contracts)	+17,834
Change as a share of the earlier figure	49%
Earlier settlement	Oct 5, 2026
Later settlement	Oct 6, 2026
Days to expiry	17

Rule: |change| >= 10000 or (>= 2000 and >= 50% of prior), and |change share| >= 2.0 x bucket median; prior OI >= 1000
Values that cleared it: Change: 17,834; Change as a share of the earlier figure: 0.4902
Contracts traded behind each figure: Open interest changed: 42
Baseline: median absolute open interest change share, contracts 1 to 3 weeks out: 0.1134
Baseline window: last 20 sessions
Baseline n: 8
Claim level: 0, a reported fact

This snapshot is itself a settlement figure, so it has no follow-up of its own.