OITracker Cboe delayed data

Contract OI history

Back to MRK

Jan 21, 2028 EXPIRATION

MRK $65.00 Put

MRK280121P00065000

Latest saved OI251Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $65.00 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. 2571280 2026-10-02: 257 OI2026-10-05: 257 OI2026-10-06: 257 OI2026-10-07: 257 OI2026-10-08: 257 OI2026-10-09: 257 OI2026-10-13: 249 OI2026-10-14: 249 OI2026-10-15: 249 OI2026-10-16: 250 OI2026-10-21: 251 OI2026-10-23: 251 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, 2026Viewing2510
Oct 21, 2026251+1
Oct 16, 2026250+1
Oct 15, 20262490
Oct 14, 20262490
Oct 13, 2026249-8
Oct 09, 20262570
Oct 08, 20262570
Oct 07, 20262570
Oct 06, 20262570
Oct 05, 20262570
Oct 02, 2026257No prior observation