OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $120.00 Call

MRK280121C00120000

Latest saved OI2,123Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $120.00 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. 2,1241,0620 2026-10-02: 2,121 OI2026-10-05: 2,121 OI2026-10-06: 2,122 OI2026-10-07: 2,122 OI2026-10-08: 2,122 OI2026-10-09: 2,123 OI2026-10-13: 2,122 OI2026-10-14: 2,122 OI2026-10-15: 2,122 OI2026-10-16: 2,122 OI2026-10-21: 2,124 OI2026-10-23: 2,123 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, 2026Viewing2,123-1
Oct 21, 20262,124+2
Oct 16, 20262,1220
Oct 15, 20262,1220
Oct 14, 20262,1220
Oct 13, 20262,122-1
Oct 09, 20262,123+1
Oct 08, 20262,1220
Oct 07, 20262,1220
Oct 06, 20262,122+1
Oct 05, 20262,1210
Oct 02, 20262,121No prior observation