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Contract OI history

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Nov 20, 2026 EXPIRATION

STM $40.00 Put

STM261120P00040000

Latest saved OI1,137Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $40.00 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. 1,3766880 2026-10-02: 1,376 OI2026-10-05: 1,329 OI2026-10-06: 1,319 OI2026-10-07: 1,321 OI2026-10-08: 1,321 OI2026-10-09: 1,138 OI2026-10-13: 1,138 OI2026-10-14: 1,138 OI2026-10-15: 1,141 OI2026-10-16: 1,142 OI2026-10-21: 1,136 OI2026-10-23: 1,137 OI Oct 02, 2026Oct 23, 2026

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

STM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,137+1
Oct 21, 20261,136-6
Oct 16, 20261,142+1
Oct 15, 20261,141+3
Oct 14, 20261,1380
Oct 13, 20261,1380
Oct 09, 20261,138-183
Oct 08, 20261,3210
Oct 07, 20261,321+2
Oct 06, 20261,319-10
Oct 05, 20261,329-47
Oct 02, 20261,376No prior observation