The dollar's move higher overnight hit commodities, including oil.

Fears of a trade war also hit commodities prices, leading to a weakness in materials stocks, especially miners.

Concerns over China's sluggish growth have hit commodities, with iron ore falling to its lowest level since October 2009.

But it has since struggled to adapt to giant neighbour China's reduced appetite for coal and copper, which has hit commodities prices.

Concerns over China's sluggish growth have hit commodities, with iron ore .IO62-CNI=SI falling to its lowest level since October 2009.