Benchmark copper on the London Metal Exchange (LME) was up 1.2% at $9,150 a tonne.
On the Shanghai Futures Exchange (ShFE), speculators' net long reached 57.9% of open contracts on Friday, the most since 2003, before falling to 51.8% on Monday, Marex said.
The last warehouse company to be approved by the LME was Edgemere Terminals in August 2018, the LME said.
LME-registered warehouses also issue LME warrants, or title documents, through their London agents for material delivered into their approved warehouses.
Benchmark copper on the London Metal Exchange was down 1.9% at $7,975 a tonne.
There has been a fair amount of profit-taking on long positions," a copper trader said. "The dollar and China's coronavirus cases triggered the sell-off, but copper has come a long way since (early) last year.
Three-month copper on the London Metal Exchange was down 0.1% at $8,169.50 a tonne.
I think the market was just looking for positive news and the outcome of Georgia elections fits, but from a fundamental point of view it doesn't really change things.