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Contract OI history

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Nov 20, 2026 EXPIRATION

NTSK $17.50 Put

NTSK261120P00017500

Latest saved OI253Oct 23, 2026
Last change+12vs 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. 2531260 2026-10-09: 188 OI2026-10-13: 202 OI2026-10-14: 203 OI2026-10-15: 207 OI2026-10-16: 214 OI2026-10-21: 241 OI2026-10-23: 253 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, 2026Viewing253+12
Oct 21, 2026241+27
Oct 16, 2026214+7
Oct 15, 2026207+4
Oct 14, 2026203+1
Oct 13, 2026202+14
Oct 09, 2026188No prior observation