The slow economy.

Jan. 14 (Bloomberg) -- Canadian stocks fell to the lowest this year after Nortel Networks Corp., once the nation’s biggest company, filed for bankruptcy protection and U.S. retail sales dropped more than expected, signaling a deepening recession.

Once, Nortel is Canada's flagship enterprises, high-tech bar. Today, under the global economic crisis, it is the first major scientific and technological enterprises which is filed for bankruptcy protection.