In 1929, a businessman and economist by the name of Jerome Levy didn't like what he saw in his analysis of corporate profits. He sold his stocks before the October crash.
Almost eight decades later, the consultancy company that bears his name declared "the next recession will be caused by the deflating housing bubble." By February 2007, it predicted problems in the subprime-mortgage market would spread "to virtually all financial markets." In October 2007, it saw imminent recession -- the slump began two months later. (more)