OITracker Cboe delayed data

Contract OI history

Back to SO

Jan 21, 2028 EXPIRATION

SO $77.50 Put

SO280121P00077500

Latest saved OI289Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SO $77.50 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. 2891440 2026-10-02: 3 OI2026-10-05: 3 OI2026-10-06: 4 OI2026-10-07: 4 OI2026-10-08: 4 OI2026-10-09: 4 OI2026-10-13: 189 OI2026-10-14: 189 OI2026-10-15: 289 OI2026-10-16: 289 OI2026-10-21: 289 OI2026-10-23: 289 OI Oct 02, 2026Oct 23, 2026

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

SO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262890
Oct 21, 2026Viewing2890
Oct 16, 20262890
Oct 15, 2026289+100
Oct 14, 20261890
Oct 13, 2026189+185
Oct 09, 202640
Oct 08, 202640
Oct 07, 202640
Oct 06, 20264+1
Oct 05, 202630
Oct 02, 20263No prior observation