OITracker Cboe delayed data

Contract OI history

Back to S

Oct 30, 2026 EXPIRATION

S $21.50 Put

S261030P00021500

Latest saved OI44Oct 23, 2026
Last change+6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
S $21.50 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. 44220 2026-10-02: 2 OI2026-10-05: 2 OI2026-10-06: 3 OI2026-10-07: 3 OI2026-10-08: 3 OI2026-10-09: 3 OI2026-10-13: 8 OI2026-10-14: 8 OI2026-10-15: 10 OI2026-10-16: 10 OI2026-10-21: 38 OI2026-10-23: 44 OI Oct 02, 2026Oct 23, 2026

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

S contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing44+6
Oct 21, 202638+28
Oct 16, 2026100
Oct 15, 202610+2
Oct 14, 202680
Oct 13, 20268+5
Oct 09, 202630
Oct 08, 202630
Oct 07, 202630
Oct 06, 20263+1
Oct 05, 202620
Oct 02, 20262No prior observation