OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

MAIN $49.40 Put

MAIN261218P00049400

Latest saved OI577Oct 23, 2026
Last change+2vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MAIN $49.40 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. 5772880 2026-10-02: 511 OI2026-10-05: 511 OI2026-10-06: 511 OI2026-10-07: 515 OI2026-10-08: 519 OI2026-10-13: 531 OI2026-10-14: 535 OI2026-10-15: 539 OI2026-10-16: 529 OI2026-10-21: 575 OI2026-10-23: 577 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, 2026577+2
Oct 21, 2026Viewing575+46
Oct 16, 2026529-10
Oct 15, 2026539+4
Oct 14, 2026535+4
Oct 13, 2026531+12
Oct 08, 2026519+4
Oct 07, 2026515+4
Oct 06, 20265110
Oct 05, 20265110
Oct 02, 2026511No prior observation