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Contract OI history

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Jan 15, 2027 EXPIRATION

GEN $21.00 Put

GEN270115P00021000

Latest saved OI546Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
GEN $21.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 5462730 2026-10-09: 533 OI2026-10-13: 533 OI2026-10-14: 536 OI2026-10-15: 536 OI2026-10-16: 536 OI2026-10-21: 536 OI2026-10-23: 546 OI Oct 09, 2026Oct 23, 2026

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

GEN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing546+10
Oct 21, 20265360
Oct 16, 20265360
Oct 15, 20265360
Oct 14, 2026536+3
Oct 13, 20265330
Oct 09, 2026533No prior observation