NEW YORK — Wall Street has proven it is far from shaking off its worries about the credit market and the economy, closing sharply lower and driving the Dow Jones industrial average down another 200 points.

Concerns about credit grew Thursday after Thornburg Mortgage Inc. and a Carlyle Group bond fund revealed troubles with investments backed by mortgages. New data that showed record numbers of home foreclosures in the fourth quarter added to Wall Street's gloom.

Each of the major indexes are down more than 1 percent, with the Dow closing about 214 points lower at the 12,040 level.