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Contract OI history

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Jan 15, 2027 EXPIRATION

ACH $500.00 Put

ACH270115P00000500

Latest saved OI261Oct 20, 2026
Last change0vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ACH $500.00 put open interest history 10 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 2611300 2026-10-02: 225 OI2026-10-05: 245 OI2026-10-06: 250 OI2026-10-07: 250 OI2026-10-08: 250 OI2026-10-09: 250 OI2026-10-13: 261 OI2026-10-14: 261 OI2026-10-16: 261 OI2026-10-20: 261 OI Oct 02, 2026Oct 20, 2026

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

ACH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing2610
Oct 16, 20262610
Oct 14, 20262610
Oct 13, 2026261+11
Oct 09, 20262500
Oct 08, 20262500
Oct 07, 20262500
Oct 06, 2026250+5
Oct 05, 2026245+20
Oct 02, 2026225No prior observation