SINGAPORE, Nov 20 (Reuters) - London copper prices snapped a
five-session winning streak on Tuesday as investors practiced
caution amid mounting trade friction between the United States
and China.
    While both U.S. President Donald Trump and Chinese President
Xi Jinping expressed optimism about resolving their trade war
ahead of a planned meeting at the G20 conference in Argentina at
the end of next week, relations have since faltered again.
    Leaders attending the Asia Pacific Economic Cooperation
summit at the weekend in Papua New Guinea failed to agree to a
joint communique for the first time in history, amid deep
divisions between Washington and Beijing.
    "The trade tensions have risen again over the weekend, but
base metals have held up and I think that's the consequence of
the market taking a bit more of what fundamentals are
suggesting," said ANZ's senior commodity strategist Daniel
    A major Asia-Pacific summit's failure to agree on a
communique was down to certain countries "excusing"
protectionism and trying to force their views on others, a
senior Chinese diplomat said on Monday.             
    "I don't think it (the upside) is sustainable. There'll
definitely be an overhang from those trade tensions restricting
the upside in base metals until there's a little bit more
clarity around a potential trade deal," Hynes said.
    * COPPER: Three-month copper on the London Metal Exchange
        was down 0.5 percent at $6,225 a tonne, as of 0723 GMT.
The most-traded copper contract on the Shanghai Futures Exchange
         ended down 0.2 percent at 49,580 yuan ($7,143.89) a
    Most other base metals on the Shanghai exchange fell, while
London aluminium, nickel and zinc edged up.
    * U.S.-CHINA: China's Foreign Ministry said on Monday the
United States, whose delegation at the summit was led by Vice
President Mike Pence, attended APEC in a "blaze of anger", and
that China had not gone to "get into a boxing ring". 
    * COPPER SUPPLY: Inventories of copper in LME-registered
warehouses MCUSTX-TOTAL fell by 9,400 tonnes to 151,625 tonnes
by Nov. 16, near last month's 10-year low of 136,675 tonnes, the
latest data showed.
    * ZINC: A slide in zinc inventories on the London Metal
Exchange to their lowest in more than a decade has wrong-footed
bearish investors who are scrambling to cover or roll over
futures positions before the November contract expiry.
    * NICKEL: A Brazilian court has ordered Vale SA           ,
        , one of the world's top nickel producers, to stop
mining iron or nickel at its Onça Puma unit and pay damages to
two indigenous tribes in the area.             
    * NORNICKEL: Russian nickel and palladium producer Norilsk
Nickel (Nornickel)           plans to ramp up output over the
next five years to tap an expected boom in demand from electric
vehicle makers, its CEO and top shareholder Vladimir Potanin
told Reuters.