OITracker Cboe delayed data

Contract OI history

Back to ASPN

Nov 20, 2026 EXPIRATION

ASPN $2.50 Put

ASPN261120P00002500

Latest saved OI1,475Oct 20, 2026
Last change+180vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ASPN $2.50 put open interest history 10 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 1,4757370 2026-10-02: 1,225 OI2026-10-05: 1,225 OI2026-10-06: 1,225 OI2026-10-07: 1,225 OI2026-10-08: 1,225 OI2026-10-09: 1,225 OI2026-10-13: 1,225 OI2026-10-14: 1,295 OI2026-10-16: 1,295 OI2026-10-20: 1,475 OI Oct 02, 2026Oct 20, 2026

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

ASPN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing1,475+180
Oct 16, 20261,2950
Oct 14, 20261,295+70
Oct 13, 20261,2250
Oct 09, 20261,2250
Oct 08, 20261,2250
Oct 07, 20261,2250
Oct 06, 20261,2250
Oct 05, 20261,2250
Oct 02, 20261,225No prior observation