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 — 450 — is the max pain price.
Open interest by strike · Fri, Mar 19
■ calls (up)■ puts (down)WDC open contracts per strike for Fri, Mar 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, Mar 19
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Mar 19
— call IV— put IVATM ≈ 63.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Mar 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, Mar 19
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.78
-0.13
280
0.0021
0.64
-0.14
-0.22
0.76
-0.14
290
0.0022
0.69
-0.15
-0.25
0.73
-0.15
300
0.0024
0.72
-0.16
-0.27
0.70
-0.16
310
0.0025
0.76
-0.17
-0.30
0.68
-0.17
320
0.0026
0.79
-0.17
-0.33
0.65
-0.17
330
0.0027
0.81
-0.18
-0.36
0.62
-0.18
340
0.0027
0.83
-0.18
-0.39
0.59
-0.18
350
0.0028
0.85
-0.19
-0.41
0.56
-0.18
360
0.0028
0.86
-0.19
-0.44
0.54
-0.19
370
0.0029
0.87
-0.19
-0.47
0.51
-0.19
380
0.0029
0.87
-0.19
-0.50
0.49
-0.19
390
0.0029
0.87
-0.19
-0.53
0.46
-0.19
400
0.0029
0.87
-0.19
-0.55
0.44
-0.18
410
0.0028
0.86
-0.19
-0.58
0.41
-0.18
420
0.0028
0.85
-0.18
-0.60
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 60 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.