OITracker Cboe delayed data

Contract OI history

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Feb 19, 2027 EXPIRATION

CALM $55.00 Put

CALM270219P00055000

Latest saved OI171Oct 23, 2026
Last change+11vs 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. 171850 2026-10-08: 153 OI2026-10-09: 153 OI2026-10-13: 153 OI2026-10-14: 154 OI2026-10-16: 154 OI2026-10-20: 160 OI2026-10-23: 171 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, 2026Viewing171+11
Oct 20, 2026160+6
Oct 16, 20261540
Oct 14, 2026154+1
Oct 13, 20261530
Oct 09, 20261530
Oct 08, 2026153No prior observation