Event risk before this expiration:FOMC decision Wed, Oct 28 · Jobs report Fri, Nov 6 · CPI release Tue, Nov 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 — 380 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)MAR open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 31.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.79
-0.18
365
0.0080
0.31
-0.18
-0.21
0.75
-0.20
370
0.0090
0.34
-0.20
-0.26
0.70
-0.22
375
0.0099
0.37
-0.22
-0.30
0.68
-0.23
377.5
0.0103
0.39
-0.23
-0.33
0.65
-0.23
380
0.0107
0.40
-0.23
-0.36
0.60
-0.24
385
0.0113
0.42
-0.24
-0.41
0.57
-0.24
387.5
0.0115
0.42
-0.24
-0.44
0.54
-0.24
390
0.0117
0.43
-0.24
-0.47
0.51
-0.24
392.5
0.0118
0.43
-0.24
-0.50
0.48
-0.24
395
0.0118
0.43
-0.24
-0.53
0.45
-0.24
397.5
0.0118
0.43
-0.24
-0.56
0.42
-0.24
400
0.0117
0.42
-0.23
-0.58
0.39
-0.23
402.5
0.0115
0.41
-0.23
-0.61
0.36
-0.23
405
0.0113
0.41
-0.22
-0.64
0.34
-0.22
407.5
0.0110
0.39
-0.22
-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 48 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.