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Contract OI history

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Oct 30, 2026 EXPIRATION

MRK $155.00 Call

MRK261030C00155000

Latest saved OI1,645Oct 23, 2026
Last change+838vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $155.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,6458220 2026-10-02: 70 OI2026-10-05: 150 OI2026-10-06: 219 OI2026-10-07: 221 OI2026-10-08: 221 OI2026-10-09: 238 OI2026-10-13: 248 OI2026-10-14: 248 OI2026-10-15: 297 OI2026-10-16: 763 OI2026-10-21: 807 OI2026-10-23: 1,645 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, 2026Viewing1,645+838
Oct 21, 2026807+44
Oct 16, 2026763+466
Oct 15, 2026297+49
Oct 14, 20262480
Oct 13, 2026248+10
Oct 09, 2026238+17
Oct 08, 20262210
Oct 07, 2026221+2
Oct 06, 2026219+69
Oct 05, 2026150+80
Oct 02, 202670No prior observation