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Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $180.00 Call

MRK280121C00180000

Latest saved OI429Oct 23, 2026
Last change+21vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $180.00 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. 4462230 2026-10-02: 271 OI2026-10-05: 271 OI2026-10-06: 274 OI2026-10-07: 274 OI2026-10-08: 274 OI2026-10-09: 280 OI2026-10-13: 445 OI2026-10-14: 445 OI2026-10-15: 446 OI2026-10-16: 408 OI2026-10-21: 408 OI2026-10-23: 429 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, 2026Viewing429+21
Oct 21, 20264080
Oct 16, 2026408-38
Oct 15, 2026446+1
Oct 14, 20264450
Oct 13, 2026445+165
Oct 09, 2026280+6
Oct 08, 20262740
Oct 07, 20262740
Oct 06, 2026274+3
Oct 05, 20262710
Oct 02, 2026271No prior observation