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 — 47 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)UNFI 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 ≈ 36.1% · 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
0.91
-0.01
40
0.0260
0.02
-0.02
-0.09
0.89
-0.02
41
0.0320
0.03
-0.02
-0.11
0.86
-0.02
42
0.0396
0.03
-0.02
-0.14
0.82
-0.02
43
0.0489
0.04
-0.02
-0.18
0.78
-0.02
44
0.0598
0.04
-0.03
-0.22
0.72
-0.03
45
0.0716
0.04
-0.03
-0.28
0.64
-0.03
46
0.0820
0.05
-0.03
-0.36
0.56
-0.03
47
0.0882
0.05
-0.03
-0.45
0.47
-0.03
48
0.0881
0.05
-0.03
-0.54
0.39
-0.03
49
0.0827
0.05
-0.03
-0.62
0.32
-0.03
50
0.0742
0.05
-0.03
-0.69
0.14
-0.02
55
0.0362
0.03
-0.02
-0.88
0.07
-0.02
60
0.0186
0.02
-0.01
-0.94
0.04
-0.01
65
0.0106
0.01
-0.01
-0.97
0.03
-0.01
70
0.0065
0.01
-0.01
-0.99
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 26 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.