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 — 124 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)NOW 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 ≈ 55.9% · 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
0.71
-0.10
136
0.0100
0.20
-0.10
-0.29
0.69
-0.10
138
0.0103
0.21
-0.10
-0.31
0.67
-0.10
140
0.0107
0.22
-0.10
-0.33
0.65
-0.10
142
0.0110
0.22
-0.11
-0.36
0.62
-0.11
144
0.0112
0.23
-0.11
-0.38
0.61
-0.11
145
0.0113
0.23
-0.11
-0.39
0.60
-0.11
146
0.0114
0.23
-0.11
-0.40
0.55
-0.11
150
0.0117
0.24
-0.11
-0.45
0.53
-0.11
152
0.0118
0.24
-0.11
-0.47
0.49
-0.11
155
0.0118
0.24
-0.11
-0.51
0.48
-0.11
156
0.0118
0.24
-0.11
-0.52
0.44
-0.11
160
0.0117
0.24
-0.11
-0.57
0.40
-0.11
164
0.0115
0.23
-0.11
-0.61
0.39
-0.11
165
0.0114
0.23
-0.11
-0.62
0.34
-0.10
170
0.0109
0.22
-0.10
-0.67
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.