per-stock model-accuracy decomposition

4265.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	0.4326	0.3663 – 0.4759	12
Hit rate · SHORT	0.6844	0.6542 – 0.7145	12
Avg return · LONG (bps)	-303.2	-352.6 – -246.1	12
Avg return · SHORT (bps)	607.1	536.3 – 673.4	12
Selection rate · LONG	0.0315	0.0209 – 0.0360	12
Selection rate · SHORT	0.0431	0.0416 – 0.0440	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

-167.2

short

454.7

total

287.5

appearances 175872 · LONG 5211 · SHORT 7637

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