Event risk before this expiration:Jobs report Fri, Aug 7 · CPI release Wed, Aug 12 — 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 — 220 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)MTRN open contracts per strike for Fri, Aug 21.
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 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 21
— call IV— put IVATM ≈ 58.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 21
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 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.98
-0.05
230
0.0013
0.03
-0.06
-0.02
0.96
-0.10
240
0.0024
0.06
-0.10
-0.04
0.92
-0.16
250
0.0038
0.09
-0.17
-0.08
0.87
-0.24
260
0.0056
0.13
-0.25
-0.13
0.80
-0.33
270
0.0076
0.18
-0.33
-0.20
0.71
-0.40
280
0.0092
0.21
-0.40
-0.29
0.60
-0.45
290
0.0104
0.24
-0.45
-0.40
0.50
-0.46
300
0.0109
0.25
-0.46
-0.50
0.39
-0.44
310
0.0105
0.24
-0.44
-0.61
0.30
-0.39
320
0.0095
0.21
-0.39
-0.70
0.21
-0.33
330
0.0080
0.18
-0.32
-0.79
0.10
-0.19
350
0.0049
0.11
-0.18
-0.90
0.01
-0.04
390
0.0010
0.02
-0.04
-0.99
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 13 strikes around the money — all 21 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.