per-stock model-accuracy decomposition

9171.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	0.5546	0.4589 – 0.6944	12
Hit rate · SHORT	0.3672	0.2352 – 0.4488	12
Avg return · LONG (bps)	55.2	1.1297 – 159.9	12
Avg return · SHORT (bps)	-18.8	-94.8 – 135.4	12
Selection rate · LONG	0.0116	0.0105 – 0.0133	12
Selection rate · SHORT	0.0164	0.0121 – 0.0193	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

23.1

short

1.8384

total

25.0

appearances 215040 · LONG 2615 · SHORT 3460

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