■ 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 — 360 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)MAR 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 ≈ 25.7% · 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
0.95
-0.14
337.5
0.0088
0.04
-0.18
-0.07
0.94
-0.18
340
0.0117
0.05
-0.21
-0.08
0.91
-0.23
342.5
0.0157
0.06
-0.25
-0.11
0.88
-0.29
345
0.0209
0.07
-0.30
-0.15
0.83
-0.36
347.5
0.0273
0.09
-0.36
-0.20
0.76
-0.44
350
0.0343
0.12
-0.42
-0.27
0.67
-0.50
352.5
0.0406
0.13
-0.47
-0.36
0.57
-0.53
355
0.0444
0.14
-0.50
-0.46
0.45
-0.51
357.5
0.0446
0.15
-0.49
-0.56
0.35
-0.46
360
0.0411
0.14
-0.45
-0.67
0.26
-0.39
362.5
0.0350
0.12
-0.38
-0.76
0.18
-0.31
365
0.0281
0.10
-0.31
-0.83
0.13
-0.25
367.5
0.0216
0.08
-0.24
-0.88
0.09
-0.20
370
0.0164
0.06
-0.19
-0.91
0.07
-0.16
372.5
0.0126
0.05
-0.15
-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 58 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.