per-stock model-accuracy decomposition

4893.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	0.3926	0.3818 – 0.4067	12
Hit rate · SHORT	0.5683	0.5293 – 0.5868	12
Avg return · LONG (bps)	68.4	39.9 – 137.9	12
Avg return · SHORT (bps)	239.4	185.5 – 256.8	12
Selection rate · LONG	0.0145	0.0138 – 0.0197	12
Selection rate · SHORT	0.0170	0.0153 – 0.0184	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

49.5

short

154.6

total

204.1

appearances 406464 · LONG 6542 · SHORT 6935

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