OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

P $55.00 Put

P270521P00055000

Latest saved OI21Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
P $55.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 21100 2026-10-02: 1 OI2026-10-05: 1 OI2026-10-06: 2 OI2026-10-07: 12 OI2026-10-08: 12 OI2026-10-09: 12 OI2026-10-13: 11 OI2026-10-14: 11 OI2026-10-15: 11 OI2026-10-16: 11 OI2026-10-21: 21 OI2026-10-23: 21 OI Oct 02, 2026Oct 23, 2026

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

P contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026210
Oct 21, 2026Viewing21+10
Oct 16, 2026110
Oct 15, 2026110
Oct 14, 2026110
Oct 13, 202611-1
Oct 09, 2026120
Oct 08, 2026120
Oct 07, 202612+10
Oct 06, 20262+1
Oct 05, 202610
Oct 02, 20261No prior observation