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 — 230 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)EXPE 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 ≈ 53.3% · 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
-0.07
210
0.0022
0.15
-0.08
-0.07
0.90
-0.09
220
0.0030
0.20
-0.10
-0.10
0.86
-0.12
230
0.0037
0.24
-0.13
-0.14
0.81
-0.14
240
0.0046
0.29
-0.15
-0.19
0.76
-0.17
250
0.0053
0.34
-0.17
-0.25
0.69
-0.19
260
0.0060
0.38
-0.19
-0.31
0.63
-0.20
270
0.0065
0.41
-0.21
-0.38
0.56
-0.21
280
0.0068
0.42
-0.21
-0.44
0.49
-0.21
290
0.0070
0.43
-0.21
-0.51
0.42
-0.21
300
0.0069
0.42
-0.21
-0.58
0.36
-0.20
310
0.0066
0.40
-0.20
-0.65
0.30
-0.18
320
0.0062
0.38
-0.18
-0.70
0.25
-0.17
330
0.0056
0.34
-0.17
-0.76
0.21
-0.15
340
0.0051
0.31
-0.15
-0.80
0.17
-0.13
350
0.0045
0.27
-0.13
-0.84
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.