■ 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, Jan 21
■ calls (up)■ puts (down)GRAL 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 ≈ 87.2% · 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
0.88
-0.01
35
0.0025
0.16
-0.01
-0.11
0.86
-0.01
40
0.0029
0.18
-0.01
-0.14
0.83
-0.01
45
0.0033
0.20
-0.02
-0.17
0.81
-0.01
50
0.0036
0.22
-0.02
-0.19
0.78
-0.01
55
0.0040
0.24
-0.02
-0.22
0.76
-0.02
60
0.0042
0.25
-0.02
-0.24
0.73
-0.02
65
0.0045
0.27
-0.02
-0.27
0.71
-0.02
70
0.0047
0.28
-0.02
-0.30
0.69
-0.02
75
0.0049
0.29
-0.02
-0.32
0.67
-0.02
80
0.0051
0.30
-0.02
-0.35
0.64
-0.02
85
0.0052
0.30
-0.02
-0.37
0.62
-0.02
90
0.0053
0.31
-0.02
-0.40
0.60
-0.02
95
0.0054
0.32
-0.02
-0.42
0.58
-0.02
100
0.0055
0.32
-0.02
-0.44
0.56
-0.02
105
0.0055
0.32
-0.02
-0.46
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 31 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.