■ 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 — 40 — is the max pain price.
Open interest by strike · Fri, Oct 16
■ calls (up)■ puts (down)BIRK open contracts per strike for Fri, Oct 16.
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, Oct 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 16
— call IV— put IVATM ≈ 43.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 16
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, Oct 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
1.00
—
17.5
0.0022
0.00
-0.00
-0.01
0.99
—
20
0.0035
0.00
-0.00
-0.01
0.98
—
22.5
0.0068
0.01
-0.00
-0.02
0.96
-0.00
25
0.0126
0.01
-0.01
-0.04
0.91
-0.01
27.5
0.0229
0.02
-0.01
-0.08
0.84
-0.01
30
0.0386
0.03
-0.01
-0.16
0.71
-0.02
32.5
0.0561
0.04
-0.02
-0.28
0.55
-0.02
35
0.0665
0.05
-0.02
-0.44
0.39
-0.02
37.5
0.0641
0.05
-0.02
-0.60
0.26
-0.02
40
0.0530
0.04
-0.02
-0.73
0.17
-0.02
42.5
0.0402
0.03
-0.01
-0.82
0.11
-0.01
45
0.0292
0.03
-0.01
-0.89
0.08
-0.01
47.5
0.0208
0.02
-0.01
-0.92
0.05
-0.01
50
0.0149
0.01
-0.00
-0.95
0.04
-0.01
52.5
0.0107
0.01
—
-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 20 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.