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Contract OI history

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Oct 23, 2026 EXPIRATION

M $21.50 Put

M261023P00021500

Latest saved OI209Oct 23, 2026
Last change+12vs 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. 2091040 2026-10-02: 47 OI2026-10-05: 48 OI2026-10-06: 59 OI2026-10-07: 61 OI2026-10-08: 61 OI2026-10-09: 68 OI2026-10-13: 89 OI2026-10-14: 89 OI2026-10-15: 205 OI2026-10-16: 188 OI2026-10-21: 197 OI2026-10-23: 209 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, 2026Viewing209+12
Oct 21, 2026197+9
Oct 16, 2026188-17
Oct 15, 2026205+116
Oct 14, 2026890
Oct 13, 202689+21
Oct 09, 202668+7
Oct 08, 2026610
Oct 07, 202661+2
Oct 06, 202659+11
Oct 05, 202648+1
Oct 02, 202647No prior observation