■ 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 — 150 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)BMO 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 ≈ 20.7% · 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
0.95
-0.01
150
0.0039
0.09
-0.01
-0.06
0.93
-0.02
155
0.0054
0.12
-0.02
-0.08
0.90
-0.02
160
0.0074
0.16
-0.02
-0.11
0.86
-0.03
165
0.0100
0.20
-0.03
-0.15
0.81
-0.03
170
0.0131
0.25
-0.03
-0.21
0.74
-0.04
175
0.0164
0.30
-0.04
-0.28
0.65
-0.04
180
0.0192
0.35
-0.04
-0.37
0.55
-0.04
185
0.0211
0.37
-0.04
-0.47
0.45
-0.04
190
0.0213
0.38
-0.04
-0.57
0.26
-0.03
200
0.0174
0.31
-0.03
-0.75
0.13
-0.02
210
0.0112
0.21
-0.02
-0.87
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 11 strikes around the money — all 21 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.