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Contract OI history

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Dec 18, 2026 EXPIRATION

NTSK $17.50 Put

NTSK261218P00017500

Latest saved OI805Oct 23, 2026
Last change-2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
NTSK $17.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 8074030 2026-10-09: 289 OI2026-10-13: 708 OI2026-10-14: 708 OI2026-10-15: 780 OI2026-10-16: 780 OI2026-10-21: 807 OI2026-10-23: 805 OI Oct 09, 2026Oct 23, 2026

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

NTSK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing805-2
Oct 21, 2026807+27
Oct 16, 20267800
Oct 15, 2026780+72
Oct 14, 20267080
Oct 13, 2026708+419
Oct 09, 2026289No prior observation