Event risk before this expiration:CPI release Wed, Oct 14 — 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 — 320 — is the max pain price.
Open interest by strike · Fri, Oct 16
■ calls (up)■ puts (down)MTRN open contracts per strike for Fri, Oct 16.
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, Oct 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 16
— call IV— put IVATM ≈ 61.0% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 16
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, Oct 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.98
-0.19
200
0.0012
0.01
-0.20
-0.02
0.97
-0.23
210
0.0017
0.02
-0.24
-0.03
0.96
-0.29
220
0.0026
0.02
-0.29
-0.04
0.94
-0.36
230
0.0040
0.03
-0.36
-0.06
0.91
-0.45
240
0.0065
0.04
-0.45
-0.09
0.85
-0.57
250
0.0111
0.07
-0.57
-0.14
0.74
-0.71
260
0.0190
0.09
-0.72
-0.26
0.52
-0.81
270
0.0259
0.11
-0.82
-0.48
0.29
-0.75
280
0.0205
0.10
-0.75
-0.71
0.18
-0.63
290
0.0131
0.07
-0.63
-0.82
0.12
-0.52
300
0.0086
0.06
-0.52
-0.89
0.08
-0.44
310
0.0059
0.04
-0.43
-0.92
0.06
-0.37
320
0.0042
0.03
-0.37
-0.94
0.05
-0.32
330
0.0032
0.03
-0.32
-0.95
0.04
-0.28
340
0.0024
0.02
-0.27
-0.96
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 20 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.