Move by central banks exhilarates Wall Street

A move by the world’s cen­tral banks to lower the cost of bor­row­ing exhil­a­rated investors Wednes­day, send­ing the Dow Jones indus­trial aver­age soar­ing 490 points and eas­ing fears of a global credit cri­sis sim­i­lar to the one that fol­lowed the 2008 col­lapse of Lehman Brothers.