OITracker Cboe delayed data

Contract OI history

Back to OSS

Dec 18, 2026 EXPIRATION

OSS $17.50 Call

OSS261218C00017500

Latest saved OI240Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
OSS $17.50 call open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 2441220 2026-10-08: 244 OI2026-10-09: 244 OI2026-10-13: 244 OI2026-10-14: 244 OI2026-10-16: 240 OI2026-10-20: 240 OI2026-10-23: 240 OI Oct 08, 2026Oct 23, 2026

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

OSS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262400
Oct 20, 2026Viewing2400
Oct 16, 2026240-4
Oct 14, 20262440
Oct 13, 20262440
Oct 09, 20262440
Oct 08, 2026244No prior observation