Event risk before this expiration:FOMC decision Wed, Oct 28 · Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 10 — 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 — 150 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)BKNG open contracts per strike for Fri, Dec 18.
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, Dec 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Dec 18
— call IV— put IVATM ≈ 43.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Dec 18
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, Dec 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.74
-0.08
138
0.0128
0.19
-0.08
-0.27
0.71
-0.08
140
0.0135
0.20
-0.09
-0.30
0.68
-0.09
142
0.0141
0.20
-0.09
-0.33
0.65
-0.09
144
0.0147
0.21
-0.09
-0.36
0.63
-0.09
145
0.0149
0.21
-0.09
-0.37
0.62
-0.09
146
0.0152
0.22
-0.09
-0.39
0.59
-0.09
148
0.0155
0.22
-0.09
-0.42
0.56
-0.09
150
0.0158
0.23
-0.10
-0.45
0.52
-0.09
152
0.0160
0.23
-0.10
-0.48
0.49
-0.09
154
0.0161
0.23
-0.10
-0.52
0.48
-0.09
155
0.0161
0.23
-0.09
-0.53
0.46
-0.09
156
0.0161
0.23
-0.09
-0.55
0.43
-0.09
158
0.0160
0.22
-0.09
-0.58
0.40
-0.09
160
0.0158
0.22
-0.09
-0.61
0.37
-0.09
162
0.0155
0.21
-0.09
-0.64
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 60 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.