OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

WERN $30.00 Put

WERN261218P00030000

Latest saved OI544Oct 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
WERN $30.00 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. 5442720 2026-10-08: 492 OI2026-10-09: 492 OI2026-10-13: 542 OI2026-10-14: 542 OI2026-10-16: 542 OI2026-10-20: 543 OI2026-10-23: 544 OI Oct 08, 2026Oct 23, 2026

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

WERN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing544+1
Oct 20, 2026543+1
Oct 16, 20265420
Oct 14, 20265420
Oct 13, 2026542+50
Oct 09, 20264920
Oct 08, 2026492No prior observation