■ 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 — 29 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)BTC open contracts per strike for Fri, Dec 18.
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, Dec 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Dec 18
— call IV— put IVATM ≈ 38.0% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Dec 18
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, Dec 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.90
-0.00
20
0.0198
0.03
-0.01
-0.11
0.82
-0.01
23
0.0332
0.04
-0.01
-0.19
0.79
-0.01
24
0.0387
0.05
-0.01
-0.22
0.75
-0.01
25
0.0444
0.05
-0.01
-0.27
0.70
-0.01
26
0.0499
0.06
-0.01
-0.32
0.65
-0.01
27
0.0550
0.06
-0.01
-0.37
0.59
-0.01
28
0.0590
0.07
-0.01
-0.43
0.53
-0.01
29
0.0614
0.07
-0.01
-0.49
0.47
-0.01
30
0.0620
0.07
-0.01
-0.56
0.41
-0.01
31
0.0610
0.07
-0.01
-0.62
0.36
-0.01
32
0.0584
0.06
-0.01
-0.68
0.31
-0.01
33
0.0548
0.06
-0.01
-0.73
0.27
-0.01
34
0.0507
0.06
-0.01
-0.78
0.23
-0.01
35
0.0464
0.05
-0.01
-0.82
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 14 strikes around the money — all 24 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.