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Contract OI history

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Dec 18, 2026 EXPIRATION

RIO $77.50 Put

RIO261218P00077500

Latest saved OI715Oct 23, 2026
Last change+309vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
RIO $77.50 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. 7153570 2026-10-02: 400 OI2026-10-05: 401 OI2026-10-06: 401 OI2026-10-07: 401 OI2026-10-08: 401 OI2026-10-09: 401 OI2026-10-13: 400 OI2026-10-14: 400 OI2026-10-15: 400 OI2026-10-16: 402 OI2026-10-20: 406 OI2026-10-23: 715 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, 2026715+309
Oct 20, 2026Viewing406+4
Oct 16, 2026402+2
Oct 15, 20264000
Oct 14, 20264000
Oct 13, 2026400-1
Oct 09, 20264010
Oct 08, 20264010
Oct 07, 20264010
Oct 06, 20264010
Oct 05, 2026401+1
Oct 02, 2026400No prior observation