MRK· Merck & Co.
Open interest · contracts by strike
Spot
144.9
Max Pain
135
Call OI
89,878
Put OI
14,095
P/C ratio
0.16
Open interest by strike (contracts)
Call OIPut OISpot / max pain
Max pain 135
Spot 144.9
165
43,265
Call OI
162.5
160
3,869
157.5
155
2,892
152.5
1,869
150
6,317
149
148
147
146
145
2,856
8,701
Put OI
144
143
142
141
140
1,864
11,763
139
138
137
136
135
3,625
Max pain
134
133
132
130
3,557
125
2,369
2,136
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
MRK 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.
10 Jun → 14 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, 10 Jun → 14 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.