■ 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 — 49 — is the max pain price.
Open interest by strike · Fri, Aug 28
■ calls (up)■ puts (down)GBTC open contracts per strike for Fri, Aug 28.
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, Aug 28
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 28
— call IV— put IVATM ≈ 23.5% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 28
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, Aug 28
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.01
40
0.0146
0.01
-0.01
-0.04
0.89
-0.03
44
0.0444
0.02
-0.03
-0.11
0.86
-0.03
45
0.0600
0.02
-0.03
-0.14
0.72
-0.04
47
0.1071
0.03
-0.04
-0.28
0.67
-0.04
47.5
0.1206
0.04
-0.04
-0.33
0.61
-0.04
48
0.1324
0.04
-0.04
-0.39
0.54
-0.04
48.5
0.1404
0.04
-0.04
-0.46
0.47
-0.04
49
0.1427
0.04
-0.04
-0.53
0.40
-0.04
49.5
0.1386
0.04
-0.04
-0.60
0.34
-0.04
50
0.1293
0.04
-0.04
-0.66
0.28
-0.04
50.5
0.1169
0.03
-0.04
-0.72
0.24
-0.03
51
0.1036
0.03
-0.03
-0.77
0.20
-0.03
51.5
0.0907
0.03
-0.03
-0.80
0.17
-0.03
52
0.0789
0.02
-0.03
-0.83
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 14 strikes around the money — all 22 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.