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Contract OI history

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Apr 21, 2028 EXPIRATION

T $18.00 Put

T280421P00018000

Latest saved OI409Oct 23, 2026
Last change+15vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
T $18.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4092040 2026-10-02: 205 OI2026-10-05: 206 OI2026-10-06: 206 OI2026-10-07: 206 OI2026-10-08: 206 OI2026-10-09: 391 OI2026-10-14: 391 OI2026-10-15: 391 OI2026-10-16: 393 OI2026-10-21: 394 OI2026-10-23: 409 OI Oct 02, 2026Oct 23, 2026

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

T contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing409+15
Oct 21, 2026394+1
Oct 16, 2026393+2
Oct 15, 20263910
Oct 14, 20263910
Oct 09, 2026391+185
Oct 08, 20262060
Oct 07, 20262060
Oct 06, 20262060
Oct 05, 2026206+1
Oct 02, 2026205No prior observation