■ 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 — 18.5 — is the max pain price.
Open interest by strike · Fri, Oct 23
■ calls (up)■ puts (down)GLXY open contracts per strike for Fri, Oct 23.
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 23
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 23
— call IV— put IVATM ≈ 126.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 23
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 23
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
1.00
—
9
—
—
—
—
1.00
—
10
0.0002
—
—
0.00
1.00
—
11
0.0008
—
0.00
0.00
1.00
—
12
0.0045
—
-0.00
-0.00
0.99
-0.00
13
0.0278
0.00
-0.01
-0.01
0.92
-0.04
14
0.1516
0.00
-0.04
-0.08
0.81
-0.10
14.5
0.2828
0.00
-0.10
-0.19
0.64
-0.24
15
0.3994
0.00
-0.24
-0.36
0.43
-0.28
15.5
0.4116
0.00
-0.28
-0.57
0.25
-0.14
16
0.3246
0.00
-0.14
-0.75
0.14
-0.07
16.5
0.2136
0.00
-0.07
-0.87
0.07
-0.03
17
0.1265
0.00
-0.04
-0.94
0.04
-0.01
17.5
0.0708
0.00
-0.02
-0.97
0.02
-0.01
18
0.0387
0.00
-0.01
-0.99
0.01
-0.00
18.5
0.0210
0.00
-0.01
-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 57 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.