Event risk before this expiration:FOMC decision Wed, Oct 28 · Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 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 — 45 — is the max pain price.
Open interest by strike · Fri, Jan 15
■ calls (up)■ puts (down)GGAL open contracts per strike for Fri, Jan 15.
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 15
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Jan 15
— call IV— put IVATM ≈ 46.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Jan 15
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 15
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.93
-0.01
23
0.0103
0.02
-0.01
-0.07
0.91
-0.01
25
0.0142
0.03
-0.01
-0.09
0.85
-0.01
28
0.0222
0.04
-0.01
-0.14
0.80
-0.01
30
0.0290
0.05
-0.01
-0.20
0.70
-0.02
33
0.0398
0.06
-0.02
-0.30
0.65
-0.02
34
0.0429
0.07
-0.02
-0.35
0.61
-0.02
35
0.0455
0.07
-0.02
-0.39
0.56
-0.02
36
0.0473
0.07
-0.02
-0.44
0.51
-0.02
37
0.0483
0.07
-0.02
-0.49
0.47
-0.02
38
0.0484
0.07
-0.02
-0.54
0.42
-0.02
39
0.0476
0.07
-0.02
-0.58
0.38
-0.02
40
0.0462
0.07
-0.02
-0.63
0.34
-0.02
41
0.0442
0.07
-0.02
-0.67
0.31
-0.02
42
0.0420
0.06
-0.02
-0.71
0.27
-0.01
43
0.0394
0.06
-0.02
-0.74
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 34 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.