In Europe, shares fell on dismal earnings reports and data showing Europe's biggest economy Germany had shrunk by a record 10.1pc in the second quarter.
Positive COVID-19 vaccine developments, with Moderna Inc and Pfizer Inc launching two late-stage vaccines trials that could achieve regulatory approval and widespread use by end-2020.
The United States' move to shut the Chinese consulate in Houston, Texas on Wednesday prompted Beijing to consider closing the US consulate in the central city of Wuhan.
A week ago the metal touched a peak of $6,633 a tonne, the highest since 2018, up from a low of $4,371 in March.
A rebound in the economy of top metals consumer China and supply disruptions, mainly in the world's main producing region South America, has boosted prices.
The metal used in power and construction reached $6,633 on Monday after a spectacular rally from $4,371 in March, when the coronavirus spread worldwide.
The head of the International Monetary Fund said the global economy is "not out of the woods yet".
Copper on the London Metal Exchange has surged more than 40% since touching a 45-month low in March.
Momentum is really quite astonishing right now. Copper is within striking distance of hitting the January high and that is probably acting as a magnet to the market.
Prices of the metal used to make products widely used in the power and construction industries rose last to $5,928 a tonne, the highest since Jan. 24 and a 35pc increase since the middle of March.
The metal may stabilise around this barrier and then rise towards a falling trendline, as the uptrend from $4,371 may not reverse until it extends to $6,075.
Governments around the world have spent $10 trillion in fiscal actions but significant further efforts are needed, the head of the International Monetary Fund said.
Traders have been worried that deteriorating US-China relations could eventually hurt an existing trade deal between the world's two biggest economies and further dampen the global economy.
The dollar rebounded from its March low, reducing demand fo
Sales of vehicles, a key demand driver for metals, in China are estimated to have risen 11.7pc on the year in May, while the Chinese city of Wuhan found no new cases of COVID-19.
Three-month copper on the London Metal Exchange (LME) was up 0.8pc a
Three-month copper on the London Metal Exchange (LME) that eased 0.2pc to $5,473.50 a tonne as of 0749 GMT has gained nearly 26pc since the 2020 bottom, hit on March 19.
Another metals trader, however, said all base metals are overpriced in the sho