Event risk before this expiration:CPI release Wed, Oct 14 · 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 — 200 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)BA 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 ≈ 32.5% · 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
0.93
-0.03
155
0.0046
0.12
-0.03
-0.07
0.90
-0.04
160
0.0061
0.15
-0.04
-0.10
0.86
-0.04
165
0.0077
0.19
-0.04
-0.14
0.81
-0.05
170
0.0094
0.23
-0.06
-0.19
0.76
-0.06
175
0.0110
0.26
-0.06
-0.24
0.70
-0.07
180
0.0124
0.29
-0.07
-0.31
0.63
-0.07
185
0.0135
0.32
-0.08
-0.38
0.56
-0.08
190
0.0141
0.33
-0.08
-0.45
0.49
-0.08
195
0.0143
0.33
-0.08
-0.52
0.42
-0.08
200
0.0140
0.33
-0.08
-0.59
0.36
-0.07
205
0.0133
0.31
-0.08
-0.66
0.30
-0.07
210
0.0124
0.29
-0.07
-0.72
0.25
-0.06
215
0.0112
0.27
-0.07
-0.78
0.20
-0.06
220
0.0099
0.24
-0.06
-0.83
0.16
-0.05
225
0.0087
0.21
-0.06
-0.87
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 49 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.