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Contract OI history

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Dec 18, 2026 EXPIRATION

NSC $310.00 Put

NSC261218P00310000

Latest saved OI126Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
NSC $310.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 126630 2026-10-02: 100 OI2026-10-05: 100 OI2026-10-06: 101 OI2026-10-07: 101 OI2026-10-08: 102 OI2026-10-09: 103 OI2026-10-13: 104 OI2026-10-14: 105 OI2026-10-15: 105 OI2026-10-16: 117 OI2026-10-21: 122 OI2026-10-23: 126 OI Oct 02, 2026Oct 23, 2026

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

NSC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing126+4
Oct 21, 2026122+5
Oct 16, 2026117+12
Oct 15, 20261050
Oct 14, 2026105+1
Oct 13, 2026104+1
Oct 09, 2026103+1
Oct 08, 2026102+1
Oct 07, 20261010
Oct 06, 2026101+1
Oct 05, 20261000
Oct 02, 2026100No prior observation