■ 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 — 50 — is the max pain price.
Open interest by strike · Fri, Oct 16
■ calls (up)■ puts (down)GGAL 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 ≈ 50.1% · 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
0.85
-0.02
36
0.0251
0.04
-0.02
-0.16
0.82
-0.02
37
0.0284
0.05
-0.02
-0.19
0.79
-0.02
38
0.0316
0.05
-0.02
-0.22
0.75
-0.02
39
0.0348
0.06
-0.02
-0.26
0.71
-0.03
40
0.0376
0.06
-0.03
-0.30
0.67
-0.03
41
0.0400
0.07
-0.03
-0.34
0.63
-0.03
42
0.0419
0.07
-0.03
-0.38
0.58
-0.03
43
0.0433
0.07
-0.03
-0.43
0.54
-0.03
44
0.0440
0.07
-0.03
-0.47
0.50
-0.03
45
0.0442
0.07
-0.03
-0.52
0.46
-0.03
46
0.0439
0.07
-0.03
-0.56
0.41
-0.03
47
0.0430
0.07
-0.03
-0.60
0.38
-0.03
48
0.0418
0.07
-0.03
-0.64
0.34
-0.03
49
0.0402
0.07
-0.03
-0.68
0.31
-0.03
50
0.0383
0.06
-0.03
-0.71
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 23 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.