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 — 70 — is the max pain price.
Open interest by strike · Fri, Jan 21
■ calls (up)■ puts (down)ARWR 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 ≈ 51.8% · 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
0.90
-0.00
32
0.0043
0.11
-0.01
-0.10
0.88
-0.01
35
0.0051
0.13
-0.01
-0.12
0.83
-0.01
40
0.0065
0.16
-0.01
-0.17
0.82
-0.01
42
0.0071
0.17
-0.01
-0.18
0.79
-0.01
45
0.0079
0.19
-0.01
-0.21
0.74
-0.01
50
0.0091
0.21
-0.01
-0.27
0.68
-0.01
55
0.0102
0.23
-0.01
-0.33
0.66
-0.01
57.5
0.0106
0.24
-0.01
-0.36
0.63
-0.01
60
0.0110
0.24
-0.01
-0.39
0.60
-0.01
62.5
0.0113
0.25
-0.01
-0.42
0.57
-0.01
65
0.0116
0.25
-0.01
-0.45
0.55
-0.01
67.5
0.0118
0.26
-0.01
-0.48
0.52
-0.01
70
0.0119
0.26
-0.01
-0.51
0.50
-0.01
72.5
0.0120
0.26
-0.01
-0.54
0.47
-0.01
75
0.0120
0.26
-0.01
-0.57
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 37 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.