In the News: BYD Bumbles, Groupon Stumbles, Saab Crumbles

BHP confident in future of mining as profit jumps.

BYD troubles threaten expansion of Chinese automaker -- and Warren Buffett's investment.

Bank of America gets new battering by financial markets.

Groupon stumbles in China.

Heineken shares plunge on stagnant profit.

Heinz makes low-end push.

Hertz to begin renting electric cars in China.

Kraft cuts coffee prices 6 percent.

Maserati set to unveil Chrysler-built SUV at Frankfurt show.

Moody's Investors Service cuts Japan's credit rating.

Rio Tinto sponsors Mongolian national team at 2012 Olympics.

S&P welcomes new chief who knows crisis and change.

Saab seems destined to fail, Automotive News says.

Volkswagen comes on, American-style.