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Jan 21, 2028 EXPIRATION

C $55.00 Put

C280121P00055000

Latest saved OI158Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
C $55.00 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. 160800 2026-10-02: 160 OI2026-10-05: 160 OI2026-10-06: 155 OI2026-10-07: 155 OI2026-10-08: 155 OI2026-10-09: 155 OI2026-10-13: 155 OI2026-10-14: 155 OI2026-10-15: 156 OI2026-10-16: 156 OI2026-10-21: 158 OI2026-10-23: 158 OI Oct 02, 2026Oct 23, 2026

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

C contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1580
Oct 21, 2026158+2
Oct 16, 20261560
Oct 15, 2026156+1
Oct 14, 20261550
Oct 13, 20261550
Oct 09, 20261550
Oct 08, 20261550
Oct 07, 20261550
Oct 06, 2026155-5
Oct 05, 20261600
Oct 02, 2026160No prior observation