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Contract OI history

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Dec 18, 2026 EXPIRATION

RIO $87.50 Put

RIO261218P00087500

Latest saved OI568Oct 23, 2026
Last change+247vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
RIO $87.50 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. 5682840 2026-10-02: 308 OI2026-10-05: 308 OI2026-10-06: 308 OI2026-10-07: 308 OI2026-10-08: 308 OI2026-10-09: 308 OI2026-10-13: 307 OI2026-10-14: 307 OI2026-10-15: 307 OI2026-10-16: 305 OI2026-10-20: 321 OI2026-10-23: 568 OI Oct 02, 2026Oct 23, 2026

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

RIO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing568+247
Oct 20, 2026321+16
Oct 16, 2026305-2
Oct 15, 20263070
Oct 14, 20263070
Oct 13, 2026307-1
Oct 09, 20263080
Oct 08, 20263080
Oct 07, 20263080
Oct 06, 20263080
Oct 05, 20263080
Oct 02, 2026308No prior observation