■ 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 — 230 — is the max pain price.
Open interest by strike · Fri, Mar 19
■ calls (up)■ puts (down)NDSN open contracts per strike for Fri, Mar 19.
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, Mar 19
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Mar 19
— call IV— put IVATM ≈ 26.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Mar 19
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, Mar 19
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.01
200
0.0010
0.20
-0.02
-0.04
0.95
-0.01
210
0.0012
0.25
-0.02
-0.05
0.91
-0.02
230
0.0020
0.37
-0.03
-0.09
0.89
-0.03
240
0.0025
0.45
-0.03
-0.11
0.83
-0.04
260
0.0036
0.60
-0.04
-0.18
0.79
-0.04
270
0.0042
0.69
-0.05
-0.22
0.74
-0.05
280
0.0048
0.77
-0.05
-0.27
0.51
-0.06
320
0.0064
0.94
-0.06
-0.51
0.45
-0.06
330
0.0064
0.93
-0.06
-0.58
0.23
-0.04
370
0.0051
0.71
-0.04
-0.83
0.12
-0.03
400
0.0034
0.48
-0.03
-0.96
0.09
-0.02
410
0.0029
0.40
-0.02
-0.99
0.07
-0.02
420
0.0024
0.34
-0.02
-1.00
0.06
-0.01
430
0.0020
0.28
-0.02
-1.00
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 14 strikes around the money — all 19 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.