Accuracy
How accurate is the Pudgy Penguins model?
Every score comes from the newest chronological hold-out; the target sale is excluded from training, comparables, and its causal floor proxy.
Median accuracy (100−APE)
96.5%
Mean accuracy (100−APE)
94.7%
Within ±5%
64%
Within ±10%
88%
Within ±20%
97%
Bias
-1.0%
Accuracy by market tier
Floor, middle-market, and grail sales are scored separately so aggregate accuracy cannot hide a weak segment
| Tier | Sales | Median accuracy | Within ±10% | Bias |
|---|---|---|---|---|
| floor | 1548 | 96.6% | 89% | -0.9% |
| middle | 12 | 85.8% | 17% | -6.8% |
| grail | 1 | 34.6% | 0% | -65.4% |
Weekly median accuracy
Chronological hold-out accuracy by sale week
Error distribution
Signed hold-out error; positive means over-predicted
Scored hold-out sales
60 out-of-sample predictions frozen at evaluation time
| Item | Tier / evidence | Date | Sale | Model | Error | Accuracy |
|---|---|---|---|---|---|---|
| #6501 | floor · high | Nov 3, 2026 | 2.319Ξ | 2.278Ξ | -1.8% | 98.2% |
| #207 | floor · high | Nov 3, 2026 | 2.170Ξ | 2.381Ξ | +9.7% | 90.3% |
| #6203 | floor · high | Nov 3, 2026 | 2.330Ξ | 2.384Ξ | +2.3% | 97.7% |
| #3326 | floor · high | Nov 2, 2026 | 2.340Ξ | 2.365Ξ | +1.1% | 98.9% |
| #2453 | floor · high | Nov 2, 2026 | 2.200Ξ | 2.434Ξ | +10.6% | 89.4% |
| #8738 | floor · high | Nov 2, 2026 | 2.200Ξ | 2.430Ξ | +10.5% | 89.6% |
| #2085 | floor · high | Nov 2, 2026 | 2.220Ξ | 2.444Ξ | +10.1% | 89.9% |
| #3920 | floor · high | Nov 2, 2026 | 2.300Ξ | 2.494Ξ | +8.4% | 91.6% |
| #6501 | floor · high | Nov 2, 2026 | 2.370Ξ | 2.671Ξ | +12.7% | 87.3% |
| #3351 | floor · high | Nov 2, 2026 | 2.380Ξ | 2.497Ξ | +4.9% | 95.1% |
| #1217 | floor · high | Nov 1, 2026 | 2.360Ξ | 2.549Ξ | +8.0% | 92.0% |
| #4363 | floor · high | Nov 1, 2026 | 2.410Ξ | 2.444Ξ | +1.4% | 98.6% |
| #4363 | floor · high | Nov 1, 2026 | 2.420Ξ | 2.500Ξ | +3.3% | 96.7% |
| #3326 | floor · high | Nov 1, 2026 | 2.430Ξ | 2.688Ξ | +10.6% | 89.4% |
| #7405 | floor · high | Nov 1, 2026 | 2.480Ξ | 2.564Ξ | +3.4% | 96.6% |
| #207 | floor · high | Nov 1, 2026 | 2.480Ξ | 2.443Ξ | -1.5% | 98.5% |
| #934 | floor · high | Nov 1, 2026 | 2.440Ξ | 2.475Ξ | +1.4% | 98.6% |
| #4795 | floor · high | Oct 31, 2026 | 2.530Ξ | 2.484Ξ | -1.8% | 98.2% |
| #4795 | floor · high | Oct 31, 2026 | 2.440Ξ | 2.549Ξ | +4.5% | 95.5% |
| #7311 | floor · high | Oct 30, 2026 | 2.480Ξ | 2.443Ξ | -1.5% | 98.5% |
| #7574 | floor · high | Oct 30, 2026 | 2.480Ξ | 2.475Ξ | -0.2% | 99.8% |
| #1547 | floor · high | Oct 30, 2026 | 2.490Ξ | 2.508Ξ | +0.7% | 99.3% |
| #3790 | floor · high | Oct 30, 2026 | 2.790Ξ | 2.557Ξ | -8.4% | 91.7% |
| #5348 | floor · high | Oct 30, 2026 | 2.550Ξ | 2.498Ξ | -2.0% | 98.0% |
| #4004 | floor · high | Oct 30, 2026 | 2.490Ξ | 2.400Ξ | -3.6% | 96.4% |
| #7311 | floor · high | Oct 30, 2026 | 2.390Ξ | 2.566Ξ | +7.4% | 92.6% |
| #2937 | floor · high | Oct 30, 2026 | 2.500Ξ | 2.512Ξ | +0.5% | 99.5% |
| #3686 | floor · high | Oct 30, 2026 | 2.500Ξ | 2.450Ξ | -2.0% | 98.0% |
| #6054 | floor · high | Oct 30, 2026 | 2.500Ξ | 2.500Ξ | 0.0% | 100.0% |
| #3790 | floor · high | Oct 30, 2026 | 2.550Ξ | 2.696Ξ | +5.7% | 94.3% |
| #3134 | floor · high | Oct 30, 2026 | 2.650Ξ | 2.651Ξ | +0.0% | 100.0% |
| #7698 | floor · high | Oct 29, 2026 | 2.510Ξ | 2.504Ξ | -0.2% | 99.8% |
| #2674 | floor · high | Oct 29, 2026 | 2.470Ξ | 2.425Ξ | -1.8% | 98.2% |
| #2547 | floor · high | Oct 29, 2026 | 2.550Ξ | 2.470Ξ | -3.1% | 96.9% |
| #2674 | floor · high | Oct 29, 2026 | 2.390Ξ | 2.489Ξ | +4.1% | 95.9% |
| #3652 | floor · high | Oct 28, 2026 | 2.690Ξ | 2.466Ξ | -8.3% | 91.7% |
| #2547 | floor · high | Oct 27, 2026 | 2.470Ξ | 2.498Ξ | +1.1% | 98.9% |
| #5773 | floor · high | Oct 27, 2026 | 2.500Ξ | 2.493Ξ | -0.3% | 99.7% |
| #1604 | floor · high | Oct 27, 2026 | 2.540Ξ | 2.483Ξ | -2.2% | 97.8% |
| #5245 | floor · high | Oct 27, 2026 | 2.780Ξ | 2.796Ξ | +0.6% | 99.4% |
Model pudgy-penguins-1793718479-2026-08-03.2 · evaluated through 11/3/2026. Method details on the methodology page.