OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

CALM $55.00 Put

CALM261120P00055000

Latest saved OI179Oct 23, 2026
Last change+9vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
CALM $55.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 179890 2026-10-08: 121 OI2026-10-09: 121 OI2026-10-13: 122 OI2026-10-14: 126 OI2026-10-16: 133 OI2026-10-20: 170 OI2026-10-23: 179 OI Oct 08, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CALM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing179+9
Oct 20, 2026170+37
Oct 16, 2026133+7
Oct 14, 2026126+4
Oct 13, 2026122+1
Oct 09, 20261210
Oct 08, 2026121No prior observation