per-stock model-accuracy decomposition

4016.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	0.4768	0.3772 – 0.5825	12
Hit rate · SHORT	0.9284	0.8078 – 0.9908	12
Avg return · LONG (bps)	2.8539	-109.4 – 79.6	12
Avg return · SHORT (bps)	271.3	171.3 – 391.1	12
Selection rate · LONG	0.0138	0.0098 – 0.0191	12
Selection rate · SHORT	0.0143	0.0116 – 0.0153	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

-4.8684

short

41.6

total

36.7

appearances 120576 · LONG 1700 · SHORT 1703

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