Event risk before this expiration:Jobs report Fri, Aug 7 — macro releases historically overwhelm pinning effects; max pain reads weakest in event weeks.
■ put-side pain■ call-side painTotal payout option writers would owe at each settle price (both sides, all open interest, ×100 shares) — low settles hurt put writers, high settles hurt call writers. The minimum — 128 — is the max pain price.
Open interest by strike · Fri, Aug 7
■ calls (up)■ puts (down)MRK open contracts per strike for Fri, Aug 7.
Open-interest change — building vs unwinding
Needs two observed snapshot days for this expiration — the comparison appears automatically once the next weekday snapshot lands. We diff real observations only; nothing is estimated.
Volume by strike · Fri, Aug 7
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 7
— call IV— put IVATM ≈ 39.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 7
Net dealer gamma per strike, in dollars per 1% move, assuming the standard convention (dealers long calls, short puts) — an assumption, not an observation. Above the amber flip level hedging tends to dampen moves; below it, to amplify them.
Greeks by strike · Fri, Aug 7
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.06
121
0.0192
0.01
-0.06
-0.04
0.94
-0.08
122
0.0268
0.01
-0.08
-0.06
0.92
-0.12
123
0.0380
0.01
-0.12
-0.08
0.88
-0.18
124
0.0524
0.02
-0.18
-0.13
0.81
-0.25
125
0.0686
0.03
-0.26
-0.18
0.74
-0.33
126
0.0846
0.03
-0.33
-0.26
0.65
-0.39
127
0.0977
0.04
-0.40
-0.35
0.55
-0.43
128
0.1048
0.04
-0.43
-0.46
0.44
-0.43
129
0.1040
0.04
-0.43
-0.56
0.34
-0.39
130
0.0957
0.04
-0.40
-0.66
0.26
-0.34
131
0.0826
0.03
-0.34
-0.74
0.20
-0.28
132
0.0680
0.03
-0.28
-0.81
0.14
-0.21
133
0.0541
0.02
-0.21
-0.86
0.10
-0.16
134
0.0420
0.02
-0.16
-0.90
0.07
-0.12
135
0.0320
0.01
-0.12
-0.93
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 57 are in the CSV. Δ per $1 of underlying · Θ per day · vega per IV point.
Stacked — layer the expirations
Call open interest per strike, stacked across the checked expirations — each color is one expiry. Strikes are pruned to the liquid center of each chain.
Max pain is arithmetic, not prophecy: the settle price that would minimize what option writers pay out at expiration, computed from open interest alone. Prices sometimes gravitate toward heavy strikes into expiry — dealer hedging is a real flow — but the evidence that max pain predicts settlement better than chance is mixed, and we are not going to pretend otherwise. Use it as a map of where positioning is stacked, next to the fundamentals and the earnings calendar, not as a target.
Data: Cboe delayed public feed (~15 minutes), refreshed here about every 15 minutes. Open interest itself updates once daily, before the open. Educational information, not investment advice.