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 — 400 — is the max pain price.
Open interest by strike · Fri, Jan 15
■ calls (up)■ puts (down)HCA 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 ≈ 32.1% · 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
0.88
-0.08
380
0.0026
0.45
-0.09
-0.12
0.85
-0.10
390
0.0030
0.52
-0.10
-0.15
0.81
-0.11
400
0.0035
0.60
-0.12
-0.19
0.78
-0.12
410
0.0040
0.67
-0.13
-0.23
0.73
-0.13
420
0.0044
0.74
-0.14
-0.27
0.68
-0.14
430
0.0048
0.79
-0.15
-0.32
0.63
-0.15
440
0.0052
0.84
-0.16
-0.37
0.58
-0.16
450
0.0054
0.87
-0.16
-0.43
0.52
-0.16
460
0.0056
0.89
-0.16
-0.48
0.47
-0.16
470
0.0056
0.89
-0.16
-0.54
0.41
-0.15
480
0.0055
0.87
-0.16
-0.60
0.36
-0.15
490
0.0053
0.84
-0.15
-0.65
0.31
-0.14
500
0.0051
0.79
-0.14
-0.70
0.23
-0.12
520
0.0043
0.68
-0.12
-0.79
0.16
-0.10
540
0.0035
0.55
-0.10
-0.86
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 51 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.