per-stock model-accuracy decomposition

3936.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	0.4223	0.4116 – 0.4482	12
Hit rate · SHORT	0.6369	0.6243 – 0.6780	12
Avg return · LONG (bps)	8.5787	-35.0 – 31.6	12
Avg return · SHORT (bps)	118.6	46.4 – 146.4	12
Selection rate · LONG	0.0209	0.0191 – 0.0225	12
Selection rate · SHORT	0.0304	0.0282 – 0.0316	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

-0.4792

short

182.6

total

182.1

appearances 623616 · LONG 12956 · SHORT 18741

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