per-stock model-accuracy decomposition

7538.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	0.0596	0.0445 – 0.1865	12
Hit rate · SHORT	0.7401	0.5912 – 0.8987	12
Avg return · LONG (bps)	-109.7	-312.6 – 23.5	12
Avg return · SHORT (bps)	17.4	-223.2 – 209.0	12
Selection rate · LONG	0.0162	0.0090 – 0.0208	12
Selection rate · SHORT	0.0297	0.0213 – 0.0345	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

-4.8794

short

-0.5782

total

-5.4576

appearances 33792 · LONG 526 · SHORT 985

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