■ 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 — 27.5 — is the max pain price.
Open interest by strike · Fri, Jan 21
■ calls (up)■ puts (down)BXSL open contracts per strike for Fri, Jan 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, Jan 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Jan 21
— call IV— put IVATM ≈ 20.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Jan 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, Jan 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
1.00
—
12.5
0.0184
0.05
-0.00
-0.12
1.00
—
15
0.0297
0.06
-0.00
-0.17
1.00
—
17.5
0.0006
0.00
-0.00
-0.26
0.99
—
20
0.0164
0.00
-0.00
-0.41
0.80
-0.00
22.5
0.1591
0.04
-0.00
-0.60
0.37
-0.00
25
0.1194
0.08
-0.00
-0.74
0.21
-0.00
27.5
0.0630
0.07
0.00
-0.81
0.15
-0.00
30
0.0423
0.06
0.00
-0.85
0.12
-0.00
32.5
0.0317
0.05
—
-0.87
0.10
-0.00
35
0.0254
0.04
—
-0.89
0.09
-0.00
37.5
0.0211
0.04
—
-0.90
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.