per-stock model-accuracy decomposition

4596.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	0.3337	0.3053 – 0.3723	12
Hit rate · SHORT	0.5787	0.5463 – 0.6050	12
Avg return · LONG (bps)	-109.3	-140.3 – -70.3	12
Avg return · SHORT (bps)	199.6	106.0 – 221.7	12
Selection rate · LONG	0.0169	0.0123 – 0.0198	12
Selection rate · SHORT	0.0421	0.0398 – 0.0426	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

-71.2

short

295.6

total

224.4

appearances 436992 · LONG 7879 · SHORT 17962

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