Sharp drop for stock market

The Dow Jones industrial average dropped more than 360 points Friday - the 20th anniversary of the Black Monday crash - as lackluster corporate earnings, renewed credit concerns and rising oil prices spooked investors.

The major stock market indexes turned in their worst week since July after Caterpillar Inc., one of the world's largest construction equipment makers, soured investors mood Friday with a discouraging assessment of the U.S. economy. In a week dominated by mostly negative results from banks facing difficult credit markets and rising mortgage delinquencies, investors appeared surprised that an industrial name was feeling an economic pinch, too.