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Contract OI history

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Jan 21, 2028 EXPIRATION

RIO $40.00 Put

RIO280121P00040000

Latest saved OI228Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
RIO $40.00 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. 2281140 2026-10-02: 226 OI2026-10-05: 226 OI2026-10-06: 226 OI2026-10-07: 226 OI2026-10-08: 226 OI2026-10-09: 226 OI2026-10-13: 226 OI2026-10-14: 226 OI2026-10-15: 226 OI2026-10-16: 226 OI2026-10-20: 226 OI2026-10-23: 228 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, 2026228+2
Oct 20, 2026Viewing2260
Oct 16, 20262260
Oct 15, 20262260
Oct 14, 20262260
Oct 13, 20262260
Oct 09, 20262260
Oct 08, 20262260
Oct 07, 20262260
Oct 06, 20262260
Oct 05, 20262260
Oct 02, 2026226No prior observation