OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

DRTS $17.50 Call

DRTS270521C00017500

Latest saved OI214Oct 21, 2026
Last change+6vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
DRTS $17.50 call open interest history 6 saved observations from 2026-10-09 to 2026-10-21. Exact values and changes are listed in the table below. 2141070 2026-10-09: 195 OI2026-10-13: 202 OI2026-10-14: 204 OI2026-10-15: 204 OI2026-10-16: 208 OI2026-10-21: 214 OI Oct 09, 2026Oct 21, 2026

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

DRTS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing214+6
Oct 16, 2026208+4
Oct 15, 20262040
Oct 14, 2026204+2
Oct 13, 2026202+7
Oct 09, 2026195No prior observation