OITracker Cboe delayed data

Contract OI history

Back to ROK

May 21, 2027 EXPIRATION

ROK $350.00 Put

ROK270521P00350000

Latest saved OI32Oct 23, 2026
Last change-10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ROK $350.00 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. 42210 2026-10-02: 32 OI2026-10-05: 32 OI2026-10-06: 32 OI2026-10-07: 32 OI2026-10-08: 32 OI2026-10-09: 32 OI2026-10-13: 32 OI2026-10-14: 32 OI2026-10-15: 32 OI2026-10-16: 42 OI2026-10-21: 42 OI2026-10-23: 32 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ROK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 202632-10
Oct 21, 2026Viewing420
Oct 16, 202642+10
Oct 15, 2026320
Oct 14, 2026320
Oct 13, 2026320
Oct 09, 2026320
Oct 08, 2026320
Oct 07, 2026320
Oct 06, 2026320
Oct 05, 2026320
Oct 02, 202632No prior observation