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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $100.00 Put

MRK261218P00100000

Latest saved OI2,549Oct 23, 2026
Last change-14vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $100.00 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. 2,6441,3220 2026-10-02: 2,644 OI2026-10-05: 2,644 OI2026-10-06: 2,644 OI2026-10-07: 2,644 OI2026-10-08: 2,644 OI2026-10-09: 2,596 OI2026-10-13: 2,574 OI2026-10-14: 2,574 OI2026-10-15: 2,581 OI2026-10-16: 2,557 OI2026-10-21: 2,563 OI2026-10-23: 2,549 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, 2026Viewing2,549-14
Oct 21, 20262,563+6
Oct 16, 20262,557-24
Oct 15, 20262,581+7
Oct 14, 20262,5740
Oct 13, 20262,574-22
Oct 09, 20262,596-48
Oct 08, 20262,6440
Oct 07, 20262,6440
Oct 06, 20262,6440
Oct 05, 20262,6440
Oct 02, 20262,644No prior observation