Company: Alpha Natural Resources Inc

Shares of U.S. coal companies declined with lingering questions about the health of the Chinese economy and a potentially disastrous situation in Europe.

A look at the 10 biggest percentage decliners on New York Stock Exchange at 1 p.m.:

Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:

Shares of U.S. coal companies rose Monday as industry analysts concluded that an extended investor sell-off in the beleaguered industry has gone on for too long.

A veteran mechanic is dead after a three-story fall at an Alpha Natural Resources Inc. coal processing plant in southern West Virginia.

A look at the 10 biggest percentage decliners on New York Stock Exchange at the close of trading:

Shares of coal companies sank Tuesday after Patriot Coal Corp., a major producer, lowered its sales volume and price estimates for Appalachian metallurgical coal, citing a potential default by a customer it didn't identify.

A look at the 10 biggest percentage decliners on New York Stock Exchange at 1 p.m.:

Stocks ended near session highs Tuesday, with all three major averages logging their best rally in a month, helped by a handful of positive earnings reports and as fears over Europe diminished.

Stocks closed sharply lower Tuesday, with the Dow posting its first triple-digit decline in 2012, fueled by fears over a Greek default and amid economic growth concerns.

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