The authors of the study cited in the preceding exercise go on to consider what would have to happen for nominal stock prices to again equal real stock prices. What is the correct answer?

Preceding exercise

Two professors calculated real stock prices (adjusted for changes in the CPI) back to 1857 and concluded that inflation-adjusted stock prices were approximately equal to nominal stock prices in 1864–1865, were greater than nominal prices through 1918, tracked them rather closely … following World War I and were nearly equal to them throughout the World War II period. Since the end of World War II, however, the nominal and real stock price series have begun to diverge, with the real price moving further below the nominal price. What does this conclusion, by itself, tell us about stock prices and consumer prices during these years?