The U.S. auto industry has been struggling under the weight of massive pension and health-care obligations, and just a few months ago, there was talk of bankruptcy-court filings. But yesterday, some on Wall Street were betting on a U-turn for the car makers. The reason for their optimism: Cerberus Capital Management LP's deal to buy 80.1% of DaimlerChrysler AG's Chrysler Group for $7.4 billion. Investors bid up shares of Ford Motor Co. and General Motors Corp., betting Cerberus might wrest concessions from the United Auto Workers, which endorsed the Cerberus-Chrysler transaction. And that, these investors believe, could finally reduce the labor costs for all of Detroit's Big Three. 'Having a big firm full of smart people putting billions of dollars of investment in Chrysler is a vote of confidence in the North America auto business,' said Robert Barry, an auto analyst at Goldman Sachs Group Inc. Goldman has provided investment-banking services to Ford and GM in the ...