per-stock model-accuracy decomposition

9982.T

computed asof 2026-08-07T09:15:52

read this first — not a buy signal

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.

Decomposes ml-factor-lgbm-9f-jp-growth. Standalone walk-forward run of the same LightGBM 9-factor family on the jp-listed universe (~4,100 tickers); the referenced record's verdict applies to the jp-growth universe only.

Accuracy (median across grid)

metric	median	p25 – p75	n
Hit rate · LONG	0.5068	0.4543 – 0.5459	12
Hit rate · SHORT	1	0.7054 – 1	6
Avg return · LONG (bps)	20.4	6.7860 – 56.3	12
Avg return · SHORT (bps)	333.3	189.9 – 453.0	6
Selection rate · LONG	0.0082	0.0057 – 0.0094	12
Selection rate · SHORT	0	0 – 0.0011	12

Hit rate ≈ 0.5 means the model's picks on this stock were near coin-flip. Returns in bps per trade (1 bps = 0.01%).

PnL contribution

long

2.2151

short

3.1698

total

5.3849

appearances 127488 · LONG 1055 · SHORT 122

Research, not investment advice. Metrics describe model–stock fit, not the stock's merit.