Nickel fell to an 11-month low on Monday on worries about stainless steel, while other base metals were pressured by uncertainty about the global economy.

Aluminium touched the weakest since August last year as speculators piled on more bearish positions.

“The macro pressures continue to weigh on the downside, such as China’s growth situation, Europe’s political uncertainty and also the dollar’s pretty strong,” said Geordie Wilkes, head of research at Sucden Financial in London.

“People are now looking to the G20 for some sort of clarification, but I’m cautious about the negotiations on the (China-U.S.) trade war.”