OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

CB $270.00 Put

CB280121P00270000

Latest saved OI125Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CB $270.00 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. 125620 2026-10-02: 104 OI2026-10-05: 105 OI2026-10-06: 105 OI2026-10-07: 105 OI2026-10-08: 105 OI2026-10-09: 105 OI2026-10-13: 105 OI2026-10-14: 105 OI2026-10-15: 105 OI2026-10-16: 105 OI2026-10-21: 125 OI2026-10-23: 125 OI Oct 02, 2026Oct 23, 2026

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

CB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1250
Oct 21, 2026125+20
Oct 16, 20261050
Oct 15, 20261050
Oct 14, 20261050
Oct 13, 20261050
Oct 09, 20261050
Oct 08, 20261050
Oct 07, 20261050
Oct 06, 20261050
Oct 05, 2026105+1
Oct 02, 2026104No prior observation