OITracker Cboe delayed data

Contract OI history

Back to ETON

May 21, 2027 EXPIRATION

ETON $40.00 Put

ETON270521P00040000

Latest saved OI12Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ETON $40.00 put open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1260 2026-10-09: 0 OI2026-10-13: 10 OI2026-10-14: 12 OI2026-10-16: 12 OI2026-10-20: 12 OI2026-10-23: 12 OI Oct 09, 2026Oct 23, 2026

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

ETON contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing120
Oct 20, 2026120
Oct 16, 2026120
Oct 14, 202612+2
Oct 13, 202610+10
Oct 09, 20260No prior observation