OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

PRTA $6.00 Put

PRTA261218P00006000

Latest saved OI1,720Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
PRTA $6.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 2,0011,0000 2026-10-08: 2,001 OI2026-10-09: 2,001 OI2026-10-13: 1,720 OI2026-10-14: 1,720 OI2026-10-16: 1,720 OI2026-10-20: 1,720 OI2026-10-23: 1,720 OI Oct 08, 2026Oct 23, 2026

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

PRTA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20261,7200
Oct 20, 2026Viewing1,7200
Oct 16, 20261,7200
Oct 14, 20261,7200
Oct 13, 20261,720-281
Oct 09, 20262,0010
Oct 08, 20262,001No prior observation