Event risk before this expiration:FOMC decision Wed, Oct 28 · Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 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 — 14 — is the max pain price.
Open interest by strike · Fri, May 21
■ calls (up)■ puts (down)TNDM open contracts per strike for Fri, May 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, May 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, May 21
— call IV— put IVATM ≈ 70.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, May 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, May 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.88
-0.01
9
0.0166
0.02
-0.01
-0.11
0.85
-0.01
10
0.0196
0.03
-0.01
-0.13
0.82
-0.01
11
0.0227
0.03
-0.01
-0.16
0.79
-0.01
12
0.0259
0.04
-0.01
-0.19
0.76
-0.01
13
0.0289
0.04
-0.01
-0.22
0.72
-0.01
14
0.0318
0.04
-0.01
-0.26
0.68
-0.01
15
0.0343
0.04
-0.01
-0.30
0.60
-0.01
17
0.0381
0.05
-0.01
-0.37
0.56
-0.01
18
0.0392
0.05
-0.01
-0.41
0.48
-0.01
20
0.0402
0.05
-0.01
-0.49
0.42
-0.01
22
0.0396
0.05
-0.01
-0.55
0.33
-0.01
25
0.0369
0.05
-0.01
-0.64
0.23
-0.01
30
0.0305
0.04
-0.01
-0.75
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. 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.