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Contract OI history

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Dec 18, 2026 EXPIRATION

GRPN $21.00 Put

GRPN261218P00021000

Latest saved OI136Oct 23, 2026
Last change0vs previous saved observation
Saved market days8Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
GRPN $21.00 put open interest history 8 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 136680 2026-10-08: 132 OI2026-10-09: 132 OI2026-10-13: 132 OI2026-10-14: 132 OI2026-10-15: 132 OI2026-10-16: 136 OI2026-10-20: 136 OI2026-10-23: 136 OI Oct 08, 2026Oct 23, 2026

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

GRPN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20261360
Oct 20, 2026Viewing1360
Oct 16, 2026136+4
Oct 15, 20261320
Oct 14, 20261320
Oct 13, 20261320
Oct 09, 20261320
Oct 08, 2026132No prior observation