Event risk before this expiration:FOMC decision Wed, Oct 28 · 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 — 24 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)NRIX 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 ≈ 99.3% · 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
0.91
-0.03
16
0.0172
0.01
-0.03
-0.09
0.85
-0.04
19
0.0295
0.02
-0.04
-0.15
0.82
-0.04
20
0.0352
0.02
-0.04
-0.18
0.78
-0.04
21
0.0417
0.02
-0.04
-0.22
0.74
-0.04
22
0.0489
0.02
-0.04
-0.26
0.69
-0.04
23
0.0564
0.03
-0.04
-0.31
0.63
-0.04
24
0.0633
0.03
-0.04
-0.37
0.56
-0.04
25
0.0684
0.03
-0.04
-0.44
0.49
-0.04
26
0.0706
0.03
-0.04
-0.51
0.42
-0.04
27
0.0697
0.03
-0.04
-0.57
0.36
-0.04
28
0.0661
0.03
-0.04
-0.64
0.30
-0.04
29
0.0611
0.02
-0.04
-0.69
0.26
-0.03
30
0.0554
0.02
-0.03
-0.73
0.22
-0.03
31
0.0497
0.02
-0.03
-0.77
0.19
-0.03
32
0.0444
0.02
-0.03
-0.80
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 16 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.