Caterpillar

Caterpillar said that its rail-services unit completed the acquisition of locomotive maker Electro-Motive Diesel for $820 million plus a post-closing adjustment estimated at $108 million, The Associated Press reported.

Robust quarterly results from some of the nation's bellwether companies galvanized Wall Street on Thursday.

Stock indexes in the United States rose for a sixth consecutive session on Tuesday, propelled by a strong start to the corporate earnings season.

Fears that the global economy will worsen gripped the financial markets again Tuesday, with downbeat economic news that investors might have shrugged off in calmer times sending the broad stock market tumbling to its lowest level this year.