# 文教堂グループホールディングス (9978.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**: 文教堂グループホールディングス
- **Sector**: 小売
- **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/9978.T
- **JSON**: https://qbuntu.ai/v1/stocks/9978.T
- **License**: CC-BY-4.0

## Accuracy (median across grid)

Median LONG hit rate is 0.2619 — below a coin flip.

| metric | median | p25 | p75 | n |
|---|---:|---:|---:|---:|
| hit_rate_long | 0.2619 | 0.2140 | 0.3010 | 12 |
| hit_rate_short | 0.5933 | 0.5191 | 0.6643 | 12 |
| avg_return_long_bps | -151.6 | -162.1 | -108.7 | 12 |
| avg_return_short_bps | 43.2 | -89.9 | 183.5 | 12 |
| selection_rate_long | 0.0310 | 0.0294 | 0.0350 | 12 |
| selection_rate_short | 0.0245 | 0.0210 | 0.0292 | 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: -108.4
- short: 20.9
- total: -87.5
- appearances: LONG 7253 / SHORT 5821 of 224256

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Research, not investment advice. These metrics describe model–stock fit, not the stock's merit.
Cite as: qbuntu (2026). 9978.T per-stock accuracy. https://qbuntu.ai/stocks/9978.T