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 — 165 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)RGEN 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 ≈ 64.0% · 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
0.90
-0.11
140
0.0050
0.09
-0.11
-0.10
0.87
-0.13
145
0.0061
0.10
-0.13
-0.13
0.84
-0.15
150
0.0074
0.12
-0.15
-0.16
0.79
-0.17
155
0.0087
0.14
-0.17
-0.21
0.74
-0.19
160
0.0099
0.16
-0.19
-0.26
0.69
-0.20
165
0.0110
0.17
-0.20
-0.31
0.63
-0.22
170
0.0118
0.19
-0.22
-0.37
0.56
-0.22
175
0.0123
0.19
-0.23
-0.44
0.50
-0.23
180
0.0126
0.20
-0.23
-0.50
0.44
-0.22
185
0.0125
0.19
-0.23
-0.56
0.38
-0.21
190
0.0121
0.19
-0.22
-0.62
0.33
-0.20
195
0.0115
0.18
-0.20
-0.68
0.28
-0.18
200
0.0107
0.16
-0.19
-0.73
0.19
-0.15
210
0.0088
0.13
-0.15
-0.82
0.13
-0.11
220
0.0067
0.10
-0.12
-0.88
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 37 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.