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 — 175 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)BCPC 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 ≈ 21.0% · 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
0.96
-0.04
135
0.0028
0.04
-0.04
-0.04
0.95
-0.04
140
0.0036
0.05
-0.04
-0.04
0.94
-0.04
145
0.0048
0.06
-0.04
-0.06
0.93
-0.05
150
0.0064
0.07
-0.05
-0.07
0.87
-0.06
160
0.0124
0.10
-0.06
-0.13
0.82
-0.07
165
0.0178
0.13
-0.07
-0.18
0.74
-0.07
170
0.0260
0.16
-0.07
-0.26
0.60
-0.07
175
0.0356
0.19
-0.07
-0.40
0.41
-0.07
180
0.0380
0.19
-0.07
-0.59
0.26
-0.06
185
0.0296
0.16
-0.06
-0.74
0.17
-0.05
190
0.0207
0.13
-0.06
-0.84
0.12
-0.05
195
0.0144
0.10
-0.05
-0.89
0.09
-0.04
200
0.0104
0.08
-0.04
-0.92
0.04
-0.03
220
0.0038
0.04
-0.03
-0.97
0.03
-0.02
230
0.0026
0.03
-0.02
-0.98
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 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.