What factors may of hid the economic problems lurking below the economic boom of the twenties?

During the 1920s, agriculture wasn't doing so well. Farmers were having a hard time recovering from WWI because they had planted a surplus of food and suddenly had no market at the end of the war. And in 1929, the Stock Market crash occurred and America went into a downward spiral into the Great Depression, ending the economic good times of the 1920s.