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Contract OI history

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Dec 18, 2026 EXPIRATION

PTCT $75.00 Put

PTCT261218P00075000

Latest saved OI300Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
PTCT $75.00 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. 3001500 2026-10-08: 300 OI2026-10-09: 300 OI2026-10-13: 300 OI2026-10-14: 300 OI2026-10-16: 300 OI2026-10-20: 300 OI2026-10-23: 300 OI Oct 08, 2026Oct 23, 2026

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

PTCT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20263000
Oct 20, 2026Viewing3000
Oct 16, 20263000
Oct 14, 20263000
Oct 13, 20263000
Oct 09, 20263000
Oct 08, 2026300No prior observation