Event risk before this expiration:Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 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 — 90 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)MDT open contracts per strike for Fri, Dec 18.
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, Dec 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Dec 18
— call IV— put IVATM ≈ 26.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Dec 18
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, Dec 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.94
-0.01
77.5
0.0088
0.04
-0.01
-0.06
0.93
-0.01
80
0.0115
0.05
-0.02
-0.07
0.90
-0.02
82.5
0.0154
0.06
-0.02
-0.10
0.86
-0.02
85
0.0207
0.08
-0.02
-0.14
0.81
-0.03
87.5
0.0270
0.10
-0.03
-0.20
0.73
-0.03
90
0.0331
0.12
-0.03
-0.28
0.64
-0.04
92.5
0.0382
0.13
-0.04
-0.37
0.54
-0.04
95
0.0411
0.14
-0.04
-0.47
0.44
-0.04
97.5
0.0411
0.14
-0.04
-0.57
0.34
-0.03
100
0.0384
0.13
-0.04
-0.68
0.18
-0.02
105
0.0280
0.10
-0.03
-0.84
0.10
-0.02
110
0.0172
0.06
-0.02
-0.94
0.06
-0.01
115
0.0112
0.04
-0.01
-0.98
0.05
-0.01
120
0.0081
0.04
-0.01
-0.99
0.04
-0.01
125
0.0063
0.03
-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 27 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.