per-stock model-accuracy decomposition

7707.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	0.4843	0.4532 – 0.5608	12
Hit rate · SHORT	0.4556	0.3954 – 0.4853	12
Avg return · LONG (bps)	-5.5371	-75.1 – 27.4	12
Avg return · SHORT (bps)	-75.4	-190.9 – -11.8	12
Selection rate · LONG	0.0128	0.0102 – 0.0168	12
Selection rate · SHORT	0.0176	0.0164 – 0.0183	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

-29.6

short

-79.1

total

-108.7

appearances 513024 · LONG 6964 · SHORT 8927

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