■ 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 — 290 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)NDSN 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 ≈ 35.7% · 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
0.97
-0.18
240
0.0016
0.03
-0.17
-0.03
0.96
-0.20
250
0.0022
0.04
-0.20
-0.04
0.95
-0.24
260
0.0032
0.04
-0.23
-0.05
0.93
-0.28
270
0.0048
0.06
-0.28
-0.07
0.89
-0.32
280
0.0074
0.08
-0.32
-0.11
0.83
-0.38
290
0.0122
0.11
-0.38
-0.17
0.71
-0.42
300
0.0203
0.15
-0.42
-0.29
0.47
-0.42
310
0.0279
0.17
-0.42
-0.53
0.23
-0.33
320
0.0206
0.13
-0.33
-0.77
0.12
-0.24
330
0.0117
0.09
-0.24
-0.88
0.07
-0.19
340
0.0069
0.06
-0.19
-0.93
0.02
-0.09
380
0.0016
0.02
-0.09
-0.98
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.