LONDON, Aug 9 (Reuters) - Aluminium prices rose strongly for
a second day on Thursday, hitting their highest since late June
after a strike at Alcoa alumina refineries in Australia and
warnings of shutdowns by Rusal revived concerns of supply
    Benchmark aluminium on the London Metal Exchange (LME)
        did not trade in official rings but was bid up 1.4
percent at $2,136 a tonne after rising 3.3 percent on Wednesday.
    It hit a 15-week low of $2,000.85 in late July on
expectations that the United States would allow aluminium made
by Rusal, the biggest producer outside China, to keep trading on
global markets and trade disputes would weaken metals demand. 
    But with the more than 60-million tonne a year aluminium
market expecting a deficit this year, investors are still wary
of output disruptions, said Societe Generale analyst Robin Bhar.
    "The fundamentals for aluminium are pretty tight," he said,
predicting a global aluminium shortfall of half a million tonnes
this year. 
    ALUMINIUM STOCKS: On-warrant stocks of aluminium available
to the market in LME-registered warehouses have fallen to
832,775 tonnes, the lowest since 2007, supporting prices.
    SPREAD: However, the discount for cash aluminium over the
three-month contract MAL0-3 this week grew to its biggest
since September last year, signalling that metal is available.
    TECHNICALS: Aluminium had hit its 50-day moving average at
$2,136 and was near its 200-day moving average at $2,167.
Convincing moves above these levels could trigger further
    ALCOA STRIKE: A union said on Wednesday Alcoa        workers
had walked out at plants in Western Australia with capacity
equal to around 8 percent of the global supply of alumina, used
to smelt aluminium. Alcoa said it did not expect any immediate
impact on production.                          
    RUSAL: Sources close to Russia's Rusal           said the
company was concerned about impending catastrophe if U.S.
sanctions on it are not lifted, with some of its production
halted as early as September.             
    CHINA/TRADE WAR: China's stock markets and yuan gained on
Thursday, helping to lift industrial metals, even after China
the day before said it was slapping additional tariffs of 25
percent on $16 billion worth of U.S. imports, the latest step in
a worsening trade dispute. China is the world's biggest metals
    CHINA FACTORIES: China's factory price inflation cooled in
July amid a slowdown in economic growth. Economists expect
punitive tariffs on U.S goods to push price growth higher in
months ahead.