■ 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 — 25 — is the max pain price.
Open interest by strike · Fri, Jan 15
■ calls (up)■ puts (down)ZTO open contracts per strike for Fri, Jan 15.
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, Jan 15
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Jan 15
— call IV— put IVATM ≈ 36.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Jan 15
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, Jan 15
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.91
-0.00
15
0.0203
0.02
-0.00
-0.09
0.87
-0.01
17
0.0308
0.03
-0.01
-0.14
0.84
-0.01
18
0.0378
0.04
-0.01
-0.17
0.80
-0.01
19
0.0462
0.04
-0.01
-0.20
0.75
-0.01
20
0.0558
0.05
-0.01
-0.25
0.69
-0.01
21
0.0661
0.05
-0.01
-0.31
0.62
-0.01
22
0.0754
0.06
-0.01
-0.39
0.54
-0.01
23
0.0817
0.06
-0.01
-0.47
0.46
-0.01
24
0.0833
0.06
-0.01
-0.56
0.39
-0.01
25
0.0804
0.06
-0.01
-0.64
0.32
-0.01
26
0.0744
0.05
-0.01
-0.71
0.27
-0.01
27
0.0668
0.05
-0.01
-0.77
0.22
-0.01
28
0.0590
0.04
-0.01
-0.81
0.18
-0.00
29
0.0517
0.04
-0.00
-0.85
0.16
-0.00
30
0.0451
0.04
-0.00
-0.88
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 23 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.