MCK· McKesson Corporation
Open interest · contracts by strike
Spot
881.5
Max Pain
860
Call OI
2,612
Put OI
1,538
P/C ratio
0.59
Open interest by strike (contracts)
Call OIPut OISpot / max pain
Max pain 860
Spot 881.5
1,000
106
990
980
52
970
960
84
950
97
940
108
930
109
920
85
491
Call OI
910
27
70
900
97
347
890
24
91
880
133
181
870
84
46
860
211
279
Max pain
850
112
35
840
75
169
830
76
820
65
76
810
46
800
97
167
790
780
244
24
Put OI
770
760
125
35
750
Open interest by strike with the max-pain level marked, per expiry — heuristics over CBOE delayed chains, same strike band as the GEX profile.
History
MCK open interest, night by night.
Total call and put contracts held on each recorded session — the level the strike profile above is a snapshot of.
9 Jun → 11 Sep
OI totals over time
Contracts outstanding, summed over the whole captured chain — every listed expiry and strike, wider than the strike band and single expiry shown in the profile above.
call OI, contractsput OI, contracts
One reading per session, captured nightly after the close, 9 Jun → 11 Sep, over CBOE delayed (~15-min) chains, computed across the full listed chain. Gaps are weekends, holidays and sessions a capture missed; any reading can be absent on a session that was captured, and the series is broken rather than drawn through it.