OITracker Cboe delayed data

Contract OI history

Back to SION

Jan 15, 2027 EXPIRATION

SION $2.50 Put

SION270115P00002500

Latest saved OI7,148Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
SION $2.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 7,1483,5740 2026-10-09: 6,914 OI2026-10-13: 6,914 OI2026-10-14: 6,672 OI2026-10-15: 7,037 OI2026-10-16: 7,148 OI2026-10-20: 7,148 OI2026-10-23: 7,148 OI Oct 09, 2026Oct 23, 2026

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

SION contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20267,1480
Oct 20, 2026Viewing7,1480
Oct 16, 20267,148+111
Oct 15, 20267,037+365
Oct 14, 20266,672-242
Oct 13, 20266,9140
Oct 09, 20266,914No prior observation