# スターゼン (8043.T) — per-stock model accuracy

> Model predictability decomposition: measures how accurately the ml-factor-lgbm-9f-jp-growth model family predicts this stock's returns within the jp-listed universe. High hit_rate_long does NOT mean 'good stock to buy' -- it means 'the model historically predicted this stock well when selecting it LONG'. This is a property of model-stock fit, not intrinsic stock quality.

- **Name**: スターゼン
- **Sector**: 商社・卸売
- **Universe**: jp-listed
- **Decomposes**: `ml-factor-lgbm-9f-jp-growth` (strategy verdict: marginal) — https://qbuntu.ai/strategies/ml-factor-lgbm-9f-jp-growth
- **Computed asof**: 2026-10-01T02:33:09
- **HTML**: https://qbuntu.ai/stocks/8043.T
- **JSON**: https://qbuntu.ai/v1/stocks/8043.T
- **License**: CC-BY-4.0

## Accuracy (median across grid)

Median LONG hit rate is 0.5385 — near a coin flip.

| metric | median | p25 | p75 | n |
|---|---:|---:|---:|---:|
| hit_rate_long | 0.5385 | 0.3605 | 0.7841 | 11 |
| hit_rate_short | 0 | 0 | 0 | 5 |
| avg_return_long_bps | 8.4550 | -18.1 | 74.8 | 11 |
| avg_return_short_bps | -42.8 | -42.8 | -42.8 | 5 |
| selection_rate_long | 0.0002 | 0.0001 | 0.0002 | 12 |
| selection_rate_short | 0 | 0 | 0 | 12 |

Hit rate ≈ 0.5 means the model's picks on this stock were near coin-flip. Returns in bps/trade. Metrics with n = 0 are omitted; n < 5 is a thin sample.

## PnL contribution

- long: -0.2047
- short: -0.2371
- total: -0.4418
- appearances: LONG 152 / SHORT 19 of 737280

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Research, not investment advice. These metrics describe model–stock fit, not the stock's merit.
Cite as: qbuntu (2026). 8043.T per-stock accuracy. https://qbuntu.ai/stocks/8043.T