Which of the following is NOT a duty typically associated with investment bankers?

The option indicating loaning money to customers is not typically a duty associated with investment bankers. Investment bankers primarily focus on providing advisory services related to capital raising, mergers and acquisitions, and complex financial transactions rather than acting as lenders to individual customers.

Investment banking encompasses various services such as reviewing corporate financial statements, which assists in evaluating a company's financial health during transactions like mergers or public offerings. They also offer advisory services on mergers and acquisitions, guiding clients through the complexities of these processes, from valuation to negotiation. Additionally, investment bankers may help organizations manage their financial operations, advising on asset management strategies and investment preferences.

The distinction is important because investment bankers operate in a different sphere compared to commercial bankers, who are more involved in consumer and business loans. Thus, the activities associated with loaning money to customers are not within the traditional scope of an investment bank's responsibilities.