per-stock model-accuracy decomposition

2114.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	0.3723	0.3275 – 0.5000	12
Hit rate · SHORT	0.9904	0.9411 – 1	12
Avg return · LONG (bps)	10.7	-36.1 – 69.4	12
Avg return · SHORT (bps)	149.2	66.7 – 175.4	12
Selection rate · LONG	0.0030	0.0015 – 0.0044	12
Selection rate · SHORT	0.0034	0.0018 – 0.0058	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

0.5201

short

6.2193

total

6.7394

appearances 101376 · LONG 338 · SHORT 394

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