per-stock model-accuracy decomposition

9930.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	0.3891	0.3525 – 0.4295	12
Hit rate · SHORT	0.4444	0.1266 – 0.8768	11
Avg return · LONG (bps)	-127.9	-268.7 – -65.7	12
Avg return · SHORT (bps)	115.9	8.9798 – 559.9	11
Selection rate · LONG	0.0084	0.0043 – 0.0098	12
Selection rate · SHORT	0.0007	0.0005 – 0.0018	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

-22.8

short

14.5

total

-8.2753

appearances 172032 · LONG 1272 · SHORT 250

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