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 — 185 — is the max pain price.
Open interest by strike · Fri, Feb 19
■ calls (up)■ puts (down)WDFC open contracts per strike for Fri, Feb 19.
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, Feb 19
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Feb 19
— call IV— put IVATM ≈ 34.6% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Feb 19
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, Feb 19
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.87
-0.04
170
0.0044
0.25
-0.04
-0.13
0.85
-0.05
175
0.0050
0.28
-0.05
-0.15
0.82
-0.05
180
0.0058
0.31
-0.05
-0.18
0.79
-0.05
185
0.0066
0.34
-0.05
-0.21
0.76
-0.06
190
0.0074
0.38
-0.06
-0.25
0.72
-0.06
195
0.0082
0.41
-0.06
-0.28
0.68
-0.06
200
0.0089
0.43
-0.06
-0.33
0.58
-0.06
210
0.0101
0.47
-0.06
-0.42
0.47
-0.06
220
0.0106
0.48
-0.06
-0.53
0.37
-0.06
230
0.0103
0.46
-0.06
-0.63
0.28
-0.05
240
0.0092
0.41
-0.05
-0.72
0.21
-0.04
250
0.0078
0.35
-0.05
-0.80
0.15
-0.04
260
0.0064
0.29
-0.04
-0.86
0.11
-0.03
270
0.0051
0.24
-0.04
-0.90
0.09
-0.03
280
0.0040
0.19
-0.04
-0.94
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 30 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.