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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $135.00 Put

MRK261218P00135000

Latest saved OI1,488Oct 23, 2026
Last change+155vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $135.00 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. 1,4887440 2026-10-02: 1,063 OI2026-10-05: 1,075 OI2026-10-06: 1,117 OI2026-10-07: 1,146 OI2026-10-08: 1,146 OI2026-10-09: 1,171 OI2026-10-13: 1,274 OI2026-10-14: 1,274 OI2026-10-15: 1,280 OI2026-10-16: 1,274 OI2026-10-21: 1,333 OI2026-10-23: 1,488 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, 2026Viewing1,488+155
Oct 21, 20261,333+59
Oct 16, 20261,274-6
Oct 15, 20261,280+6
Oct 14, 20261,2740
Oct 13, 20261,274+103
Oct 09, 20261,171+25
Oct 08, 20261,1460
Oct 07, 20261,146+29
Oct 06, 20261,117+42
Oct 05, 20261,075+12
Oct 02, 20261,063No prior observation