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Contract OI history

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May 21, 2027 EXPIRATION

SO $55.00 Put

SO270521P00055000

Latest saved OI286Oct 23, 2026
Last change+15vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SO $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. 2861430 2026-10-02: 3 OI2026-10-05: 3 OI2026-10-06: 3 OI2026-10-07: 3 OI2026-10-08: 17 OI2026-10-09: 36 OI2026-10-13: 152 OI2026-10-14: 152 OI2026-10-15: 152 OI2026-10-16: 180 OI2026-10-21: 271 OI2026-10-23: 286 OI Oct 02, 2026Oct 23, 2026

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

SO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing286+15
Oct 21, 2026271+91
Oct 16, 2026180+28
Oct 15, 20261520
Oct 14, 20261520
Oct 13, 2026152+116
Oct 09, 202636+19
Oct 08, 202617+14
Oct 07, 202630
Oct 06, 202630
Oct 05, 202630
Oct 02, 20263No prior observation