"Suppose an investment bank is buying $50 million in long-term mortgage-backed securities, and finances the investment by borrowing 80% and paying for the other 20% out of equity. What is the bank's return on its equity investment if the value of the mortgage-backed securities increases by 10% during the year after they are purchased?"

Which of the following best explains how trade enables greater specialization among producers? a. trade diversifies the market by bringing specialized goods from around the world. b. trade requires distribution networks and adds one more step to the production process. c. trade enables producers to open up new markets for their goods and services. d. trade allows people to focus on one kind of production and trade for their other needs.