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 — 36 — is the max pain price.
Open interest by strike · Fri, May 21
■ calls (up)■ puts (down)CNP open contracts per strike for Fri, May 21.
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, May 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, May 21
— call IV— put IVATM ≈ 21.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, May 21
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, May 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.87
-0.00
35
0.0261
0.07
-0.00
-0.14
0.85
-0.00
36
0.0308
0.07
-0.00
-0.16
0.82
-0.00
37
0.0361
0.08
-0.01
-0.19
0.78
-0.00
38
0.0420
0.09
-0.01
-0.23
0.74
-0.01
39
0.0482
0.10
-0.01
-0.27
0.69
-0.01
40
0.0544
0.11
-0.01
-0.32
0.64
-0.01
41
0.0598
0.12
-0.01
-0.38
0.57
-0.01
42
0.0639
0.12
-0.01
-0.45
0.45
-0.01
44
0.0660
0.12
-0.01
-0.58
0.39
-0.01
45
0.0638
0.12
-0.01
-0.64
0.33
-0.01
46
0.0599
0.11
-0.01
-0.70
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. 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.