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Contract OI history

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Mar 19, 2027 EXPIRATION

MRK $145.00 Put

MRK270319P00145000

Latest saved OI498Oct 23, 2026
Last change-2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $145.00 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. 5002500 2026-10-02: 479 OI2026-10-05: 478 OI2026-10-06: 482 OI2026-10-07: 482 OI2026-10-08: 482 OI2026-10-09: 484 OI2026-10-13: 484 OI2026-10-14: 484 OI2026-10-15: 492 OI2026-10-16: 492 OI2026-10-21: 500 OI2026-10-23: 498 OI Oct 02, 2026Oct 23, 2026

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

MRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing498-2
Oct 21, 2026500+8
Oct 16, 20264920
Oct 15, 2026492+8
Oct 14, 20264840
Oct 13, 20264840
Oct 09, 2026484+2
Oct 08, 20264820
Oct 07, 20264820
Oct 06, 2026482+4
Oct 05, 2026478-1
Oct 02, 2026479No prior observation