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Contract OI history

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Dec 18, 2026 EXPIRATION

WTRG $40.00 Put

WTRG261218P00040000

Latest saved OI14Oct 23, 2026
Last change-6vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WTRG $40.00 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. 22110 2026-10-02: 19 OI2026-10-05: 19 OI2026-10-06: 21 OI2026-10-07: 21 OI2026-10-08: 21 OI2026-10-09: 21 OI2026-10-14: 20 OI2026-10-15: 22 OI2026-10-16: 20 OI2026-10-21: 20 OI2026-10-23: 14 OI Oct 02, 2026Oct 23, 2026

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

WTRG contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing14-6
Oct 21, 2026200
Oct 16, 202620-2
Oct 15, 202622+2
Oct 14, 202620-1
Oct 09, 2026210
Oct 08, 2026210
Oct 07, 2026210
Oct 06, 202621+2
Oct 05, 2026190
Oct 02, 202619No prior observation