OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

MAIN $39.70 Put

MAIN280121P00039700

Latest saved OI22Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MAIN $39.70 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 22110 2026-10-02: 7 OI2026-10-05: 7 OI2026-10-06: 7 OI2026-10-07: 7 OI2026-10-08: 7 OI2026-10-13: 14 OI2026-10-14: 14 OI2026-10-15: 14 OI2026-10-16: 14 OI2026-10-21: 22 OI2026-10-23: 22 OI Oct 02, 2026Oct 23, 2026

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

MAIN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026220
Oct 21, 2026Viewing22+8
Oct 16, 2026140
Oct 15, 2026140
Oct 14, 2026140
Oct 13, 202614+7
Oct 08, 202670
Oct 07, 202670
Oct 06, 202670
Oct 05, 202670
Oct 02, 20267No prior observation