■ 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 — 65 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)KNX open contracts per strike for Fri, Aug 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, Aug 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 21
— call IV— put IVATM ≈ 40.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 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, Aug 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
1.00
-0.00
55
0.0009
0.00
-0.00
-0.00
1.00
-0.00
57.5
0.0019
0.00
-0.00
-0.00
0.99
-0.01
60
0.0040
0.00
-0.01
-0.01
0.98
-0.01
62.5
0.0088
0.01
-0.01
-0.02
0.96
-0.03
65
0.0198
0.01
-0.03
-0.04
0.90
-0.05
67.5
0.0436
0.02
-0.05
-0.10
0.75
-0.09
70
0.0840
0.03
-0.09
-0.25
0.50
-0.10
72.5
0.1119
0.04
-0.11
-0.50
0.25
-0.08
75
0.0879
0.03
-0.09
-0.76
0.11
-0.05
77.5
0.0485
0.02
-0.05
-0.90
0.05
-0.03
80
0.0238
0.01
-0.03
-0.96
0.02
-0.01
82.5
0.0117
0.01
-0.01
-0.98
0.01
-0.01
85
0.0060
0.00
-0.01
-0.99
0.01
-0.01
87.5
0.0032
0.00
-0.00
-1.00
0.00
-0.00
90
0.0018
0.00
-0.00
-1.00
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 30 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.