■ 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 — 170 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)CAMT open contracts per strike for Fri, Aug 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, Aug 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 21
— call IV— put IVATM ≈ 69.4% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 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, Aug 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.97
-0.07
140
0.0032
0.02
-0.07
-0.03
0.95
-0.11
145
0.0052
0.03
-0.12
-0.05
0.91
-0.17
150
0.0080
0.04
-0.18
-0.09
0.86
-0.25
155
0.0112
0.06
-0.25
-0.14
0.79
-0.32
160
0.0144
0.08
-0.32
-0.21
0.70
-0.39
165
0.0173
0.10
-0.39
-0.30
0.61
-0.43
170
0.0193
0.10
-0.43
-0.39
0.51
-0.45
175
0.0201
0.11
-0.45
-0.49
0.41
-0.43
180
0.0197
0.11
-0.43
-0.59
0.32
-0.40
185
0.0181
0.10
-0.40
-0.68
0.24
-0.34
190
0.0158
0.09
-0.34
-0.76
0.17
-0.28
195
0.0131
0.07
-0.28
-0.83
0.12
-0.21
200
0.0103
0.06
-0.21
-0.88
0.06
-0.11
210
0.0057
0.03
-0.11
-0.95
0.02
-0.05
220
0.0027
0.01
-0.05
-0.98
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 41 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.