OITracker Cboe delayed data

Contract OI history

Back to WAT

Nov 20, 2026 EXPIRATION

WAT $420.00 Put

WAT261120P00420000

Latest saved OI33Oct 23, 2026
Last change+19vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WAT $420.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 33160 2026-10-02: 0 OI2026-10-05: 1 OI2026-10-06: 2 OI2026-10-07: 2 OI2026-10-08: 5 OI2026-10-09: 7 OI2026-10-14: 7 OI2026-10-15: 7 OI2026-10-16: 7 OI2026-10-21: 14 OI2026-10-23: 33 OI Oct 02, 2026Oct 23, 2026

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

WAT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 202633+19
Oct 21, 2026Viewing14+7
Oct 16, 202670
Oct 15, 202670
Oct 14, 202670
Oct 09, 20267+2
Oct 08, 20265+3
Oct 07, 202620
Oct 06, 20262+1
Oct 05, 20261+1
Oct 02, 20260No prior observation