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Contract OI history

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Dec 18, 2026 EXPIRATION

EXTR $20.00 Put

EXTR261218P00020000

Latest saved OI117Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
EXTR $20.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 117580 2026-10-08: 113 OI2026-10-09: 111 OI2026-10-13: 111 OI2026-10-14: 116 OI2026-10-16: 116 OI2026-10-20: 116 OI2026-10-23: 117 OI Oct 08, 2026Oct 23, 2026

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

EXTR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing117+1
Oct 20, 20261160
Oct 16, 20261160
Oct 14, 2026116+5
Oct 13, 20261110
Oct 09, 2026111-2
Oct 08, 2026113No prior observation