OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

MAIN $44.40 Put

MAIN261218P00044400

Latest saved OI255Oct 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 $44.40 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. 2551270 2026-10-02: 245 OI2026-10-05: 246 OI2026-10-06: 245 OI2026-10-07: 245 OI2026-10-08: 248 OI2026-10-13: 248 OI2026-10-14: 248 OI2026-10-15: 250 OI2026-10-16: 250 OI2026-10-21: 255 OI2026-10-23: 255 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, 20262550
Oct 21, 2026Viewing255+5
Oct 16, 20262500
Oct 15, 2026250+2
Oct 14, 20262480
Oct 13, 20262480
Oct 08, 2026248+3
Oct 07, 20262450
Oct 06, 2026245-1
Oct 05, 2026246+1
Oct 02, 2026245No prior observation