Event risk before this expiration:Jobs report Fri, Nov 6 · CPI release Tue, Nov 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 — 430 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)SPGI open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 28.5% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.74
-0.23
430
0.0094
0.38
-0.23
-0.26
0.72
-0.24
432.5
0.0099
0.39
-0.24
-0.29
0.69
-0.24
435
0.0104
0.41
-0.25
-0.31
0.67
-0.25
437.5
0.0109
0.42
-0.26
-0.34
0.64
-0.26
440
0.0113
0.43
-0.26
-0.36
0.61
-0.26
442.5
0.0117
0.44
-0.27
-0.39
0.58
-0.27
445
0.0120
0.45
-0.27
-0.42
0.52
-0.27
450
0.0123
0.46
-0.27
-0.49
0.49
-0.27
452.5
0.0124
0.46
-0.27
-0.52
0.46
-0.27
455
0.0124
0.46
-0.27
-0.55
0.40
-0.26
460
0.0120
0.45
-0.26
-0.61
0.34
-0.24
465
0.0114
0.42
-0.25
-0.67
0.29
-0.23
470
0.0106
0.40
-0.23
-0.72
0.24
-0.21
475
0.0097
0.36
-0.22
-0.77
0.20
-0.19
480
0.0086
0.33
-0.20
-0.81
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 47 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.