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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $115.00 Put

MRK261218P00115000

Latest saved OI1,322Oct 23, 2026
Last change-28vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $115.00 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. 1,4197090 2026-10-02: 1,419 OI2026-10-05: 1,400 OI2026-10-06: 1,381 OI2026-10-07: 1,381 OI2026-10-08: 1,381 OI2026-10-09: 1,388 OI2026-10-13: 1,384 OI2026-10-14: 1,384 OI2026-10-15: 1,396 OI2026-10-16: 1,381 OI2026-10-21: 1,350 OI2026-10-23: 1,322 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, 2026Viewing1,322-28
Oct 21, 20261,350-31
Oct 16, 20261,381-15
Oct 15, 20261,396+12
Oct 14, 20261,3840
Oct 13, 20261,384-4
Oct 09, 20261,388+7
Oct 08, 20261,3810
Oct 07, 20261,3810
Oct 06, 20261,381-19
Oct 05, 20261,400-19
Oct 02, 20261,419No prior observation