7. A substantial amount of U.S. dollars is in circulation outside the United States. Dol¬

lars are often accepted in exchange—that is, as money—in countries around the world. Suppose something occurs that makes foreign nationals no longer willing to hold dollars so those dollars, once out¬ side the U.S. banking system, now get de¬ posited in U.S. banks. What is the effect on the U.S. banking system?