* GRAPHIC-2019 asset returns: tmsnrt.rs/2jvdmXl

* China April trade surprises with export fall, import growth

* Focus on U.S-China trade talks (Adds official prices, adds Norsk)

By Zandi Shabalala

LONDON, May 8 (Reuters) – Copper fell to a near three-month low on Wednesday on concerns over a potential resumption of tit-for-tat trade tariffs between the United States and China ahead of last-ditch negotiations.

U.S. President Donald Trump’s threat to increase tariffs on $200 billion worth of Chinese goods on Friday has raised the risk of an escalation in the trade spat between Washington and Beijing.

This could further slow the global economy while clouding the outlook for demand from top metals consumer China.

The two sides will hold last-ditch talks in Washington on Thursday and