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Contract OI history

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Jan 15, 2027 EXPIRATION

NTSK $20.00 Put

NTSK270115P00020000

Latest saved OI172Oct 23, 2026
Last change+139vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
NTSK $20.00 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. 172860 2026-10-09: 15 OI2026-10-13: 26 OI2026-10-14: 26 OI2026-10-15: 26 OI2026-10-16: 26 OI2026-10-21: 33 OI2026-10-23: 172 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, 2026Viewing172+139
Oct 21, 202633+7
Oct 16, 2026260
Oct 15, 2026260
Oct 14, 2026260
Oct 13, 202626+11
Oct 09, 202615No prior observation