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Contract OI history

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Jan 21, 2028 EXPIRATION

PRTA $20.00 Call

PRTA280121C00020000

Latest saved OI157Oct 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 $20.00 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. 157780 2026-10-08: 157 OI2026-10-09: 157 OI2026-10-13: 157 OI2026-10-14: 157 OI2026-10-16: 157 OI2026-10-20: 157 OI2026-10-23: 157 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, 2026Viewing1570
Oct 20, 20261570
Oct 16, 20261570
Oct 14, 20261570
Oct 13, 20261570
Oct 09, 20261570
Oct 08, 2026157No prior observation