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Contract OI history

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Jan 21, 2028 EXPIRATION

STM $55.00 Put

STM280121P00055000

Latest saved OI1,760Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $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. 1,7608800 2026-10-02: 1,756 OI2026-10-05: 1,760 OI2026-10-06: 1,760 OI2026-10-07: 1,760 OI2026-10-08: 1,760 OI2026-10-09: 1,760 OI2026-10-13: 1,760 OI2026-10-14: 1,760 OI2026-10-15: 1,760 OI2026-10-16: 1,760 OI2026-10-21: 1,760 OI2026-10-23: 1,760 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, 2026Viewing1,7600
Oct 21, 20261,7600
Oct 16, 20261,7600
Oct 15, 20261,7600
Oct 14, 20261,7600
Oct 13, 20261,7600
Oct 09, 20261,7600
Oct 08, 20261,7600
Oct 07, 20261,7600
Oct 06, 20261,7600
Oct 05, 20261,760+4
Oct 02, 20261,756No prior observation