Stock index futures pointed to a lower open on Tuesday, with futures for the S&P 500, Dow Jones and Nasdaq down 0.4 to 0.6 percent at 0903 GMT.
* Investors are likely to be cautious after Japan raised the severity of the nuclear accident to the highest level, putting it on par with the Chernobyl 1986 disaster.
* Earnings news will be another focus, following Alcoa Inc
* Elsewhere, Chevron Corp
* Brent crude extended overnight losses on concern high fuel prices will destroy demand and following Goldman Sachs recommendation on Monday to lock in trading profits.
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* Looking at merger and acquisition news, two sources familiar with the matter told Reuters that Hewlett-Packard Co
* Staff at Taiwan unit Nan Shan Life Insurance Co Ltd have been urged by American International group Inc
* A former private equity executive was sentenced to 13 years and four months in prison for his role in a real estate investment fraud that federal authorities have called a $255 million Ponzi scheme targeting Orthodox Jews.
* The Wall Street Journal reported that the Bank of America Corp's
* Amazon.com Inc
* U.S. stocks mostly fell on Monday, with energy shares selling off on lower oil prices and concerns that company outlooks may fall short of expectations.
The Dow Jones industrial average <.DJI> rose 0.01 percent, the Standard & Poor's 500 Index <.SPX> fell 0.3 percent and the Nasdaq Composite Index <.IXIC> lost 0.3 percent.
* European shares fell on Tuesday after Japan raised the severity of its nuclear crisis to a level equal to that of Chernobyl, the world's worst nuclear disaster and on earnings concern after the revenue miss by Alcoa.
(Reporting by Joanne Frearson; Editing by Erica Billingham)