The most-traded June aluminium contract on the Shanghai Futures Exchange (ShFE) closed up 0.2 percent at 14,375 yuan ($2,288.65) a tonne on Wednesday, having earlier touched 14,475 yuan, its highest since March 6. Physical premiums for aluminium deliveries to mainland China from ShFE bonded warehouses rose by $5 to $135 a tonne on Wednesday. In the United States, the Comex aluminium premium jumped to 20.7 cents a pound ($456 a tonne) from 18.4 cents on Friday, the highest in three years.