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 — 650 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)MEDP 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 ≈ 32.1% · 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
0.89
-0.25
600
0.0028
0.34
-0.26
-0.11
0.86
-0.28
610
0.0033
0.40
-0.29
-0.14
0.83
-0.32
620
0.0040
0.45
-0.33
-0.17
0.79
-0.35
630
0.0046
0.51
-0.36
-0.21
0.74
-0.38
640
0.0053
0.57
-0.39
-0.26
0.69
-0.41
650
0.0060
0.63
-0.42
-0.32
0.63
-0.43
660
0.0066
0.67
-0.44
-0.38
0.56
-0.44
670
0.0070
0.70
-0.45
-0.45
0.49
-0.44
680
0.0071
0.70
-0.45
-0.52
0.42
-0.43
690
0.0070
0.69
-0.44
-0.59
0.35
-0.41
700
0.0067
0.66
-0.41
-0.66
0.29
-0.38
710
0.0061
0.61
-0.38
-0.72
0.24
-0.34
720
0.0055
0.55
-0.35
-0.77
0.19
-0.31
730
0.0048
0.49
-0.31
-0.82
0.15
-0.27
740
0.0041
0.43
-0.28
-0.86
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 43 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.