■ 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 — 320 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)GPI 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 ≈ 47.4% · 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
0.99
-0.13
195
0.0015
0.01
-0.10
-0.02
0.98
-0.13
200
0.0018
0.01
-0.11
-0.02
0.97
-0.14
210
0.0028
0.02
-0.14
-0.03
0.95
-0.17
220
0.0041
0.04
-0.18
-0.05
0.92
-0.22
230
0.0061
0.06
-0.23
-0.08
0.86
-0.30
240
0.0100
0.08
-0.31
-0.14
0.75
-0.40
250
0.0163
0.12
-0.40
-0.25
0.56
-0.47
260
0.0214
0.15
-0.47
-0.44
0.36
-0.46
270
0.0196
0.14
-0.45
-0.64
0.22
-0.39
280
0.0141
0.11
-0.38
-0.78
0.14
-0.30
290
0.0094
0.09
-0.29
-0.86
0.09
-0.24
300
0.0063
0.06
-0.22
-0.91
0.06
-0.18
310
0.0043
0.05
-0.17
-0.94
0.04
-0.14
320
0.0030
0.03
-0.12
-0.96
0.03
-0.11
330
0.0022
0.03
-0.09
-0.97
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 34 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.