DB 2: Stock Market Crash 11 unread reply.11 reply. Watch the above video. Once you have done this click on the above DB link "Stock Market Crash" and create a thread with at least one page answering and explaining the following: What were the major differences between the 1920s and the 1930s? How did the end of WWI affect the U.S. economy? Explain the relationship between Liberty Bonds, “Investing Culture”, Margin Buying, and the rapid appreciation of stock values in the 1920s? Why did the major bankers meet at J.P Morgan’s office across the street from the NYSE? What did they subsequently do? How did the “Liquidity Crisis” compound an even greater contraction in GDP after stock prices collapsed? What means did Roosevelt implement to help stabilize stock markets immediately and long-term? What effects did the Great Depression have internationally? Do you see any parallels today?