■ 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 — 28 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)RDWR 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 ≈ 51.7% · 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
0.94
-0.01
15
0.0091
0.02
-0.01
-0.06
0.93
-0.01
16
0.0107
0.02
-0.01
-0.07
0.91
-0.01
17
0.0125
0.03
-0.01
-0.08
0.84
-0.01
21
0.0230
0.04
-0.01
-0.15
0.72
-0.01
25
0.0382
0.06
-0.01
-0.27
0.63
-0.01
27
0.0450
0.06
-0.01
-0.36
0.58
-0.01
28
0.0474
0.07
-0.01
-0.41
0.53
-0.01
29
0.0487
0.07
-0.01
-0.46
0.48
-0.01
30
0.0490
0.07
-0.01
-0.51
0.44
-0.01
31
0.0483
0.07
-0.01
-0.55
0.33
-0.01
34
0.0428
0.06
-0.01
-0.67
0.29
-0.01
35
0.0404
0.06
-0.01
-0.70
0.27
-0.01
36
0.0380
0.06
-0.01
-0.73
0.24
-0.01
37
0.0356
0.05
-0.01
-0.75
0.19
-0.01
40
0.0291
0.05
-0.01
-0.81
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 16 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.