Event risk before this expiration:Jobs report Fri, Nov 6 · CPI release Tue, Nov 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 — 5 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)ACHR open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 82.5% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
1.00
0.00
1
0.0033
0.00
0.00
-0.00
1.00
0.00
1.5
0.0080
0.00
-0.00
-0.01
0.99
-0.00
2
0.0184
0.00
-0.00
-0.01
0.98
-0.00
2.5
0.0425
0.00
-0.00
-0.02
0.95
-0.00
3
0.0991
0.00
-0.00
-0.05
0.88
-0.00
3.5
0.2231
0.00
-0.00
-0.13
0.71
-0.01
4
0.4051
0.00
-0.01
-0.29
0.48
-0.01
4.5
0.4689
0.00
-0.01
-0.52
0.30
-0.01
5
0.3809
0.00
-0.01
-0.71
0.19
-0.01
5.5
0.2717
0.00
-0.01
-0.83
0.12
-0.00
6
0.1890
0.00
-0.00
-0.89
0.08
-0.00
6.5
0.1327
0.00
-0.00
-0.93
0.06
-0.00
7
0.0948
0.00
-0.00
-0.96
0.04
-0.00
7.5
0.0691
0.00
-0.00
-0.98
0.03
-0.00
8
0.0514
0.00
-0.00
-0.99
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 18 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.