■ 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 — 250 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)NDSN open contracts per strike for Fri, Sep 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, Sep 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Sep 18
— call IV— put IVATM ≈ 24.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Sep 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, Sep 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.05
240
0.0017
0.07
-0.05
-0.04
0.95
-0.06
250
0.0025
0.10
-0.06
-0.05
0.93
-0.07
260
0.0036
0.12
-0.08
-0.07
0.90
-0.09
270
0.0052
0.17
-0.09
-0.11
0.85
-0.10
280
0.0076
0.22
-0.11
-0.16
0.78
-0.12
290
0.0109
0.28
-0.12
-0.23
0.66
-0.14
300
0.0147
0.35
-0.14
-0.35
0.50
-0.14
310
0.0171
0.38
-0.14
-0.51
0.34
-0.12
320
0.0158
0.35
-0.12
-0.67
0.21
-0.10
330
0.0121
0.28
-0.10
-0.79
0.14
-0.08
340
0.0085
0.21
-0.08
-0.87
0.09
-0.06
350
0.0059
0.16
-0.06
-0.91
0.06
-0.05
360
0.0041
0.12
-0.05
-0.94
0.04
-0.04
370
0.0030
0.09
-0.04
-0.96
0.03
-0.03
380
0.0022
0.07
-0.04
-0.97
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.