OITracker Cboe delayed data

Contract OI history

Back to M

Oct 30, 2026 EXPIRATION

M $21.50 Put

M261030P00021500

Latest saved OI107Oct 23, 2026
Last change-17vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
M $21.50 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. 126630 2026-10-02: 32 OI2026-10-05: 33 OI2026-10-06: 35 OI2026-10-07: 35 OI2026-10-08: 35 OI2026-10-09: 69 OI2026-10-13: 71 OI2026-10-14: 71 OI2026-10-15: 91 OI2026-10-16: 126 OI2026-10-21: 124 OI2026-10-23: 107 OI Oct 02, 2026Oct 23, 2026

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

M contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing107-17
Oct 21, 2026124-2
Oct 16, 2026126+35
Oct 15, 202691+20
Oct 14, 2026710
Oct 13, 202671+2
Oct 09, 202669+34
Oct 08, 2026350
Oct 07, 2026350
Oct 06, 202635+2
Oct 05, 202633+1
Oct 02, 202632No prior observation