Share of each SH6 within the selected SH4, in FOB. Top 12 shown.
Each +1% in price coincided with a 0.80% drop in volume (β=-0.80, R²=0.83, n=63) with strong historical fit.
Dashed line = aggregate β. Bars more transparent = weaker R² (less reliable fit).
ordered by average price (lowest → highest) · share ≥ 0.5%
