What investment banking firm went bankrupt in 2008, signaling the beginning of a major economic crisis?

CitiBank

Wells Fargo

Lehman Brothers

Price Waterhouse

The investment banking firm that went bankrup in 2008, signaling the beginning of the Great Recession, was Lehman Brothers.

Explanation:

Lehman Brothers Holdings Inc. was a global financial services company of the United States founded in 1850. It stood out in investment banking, management of financial assets and investments in fixed income, commercial banking, investment management and banking services in general. Before declaring bankruptcy on September 15, 2008, Lehman Brothers was the fourth largest investment bank in the United States (after Goldman Sachs, Morgan Stanley and Merrill Lynch) and had 680 billion US dollars in assets.