The 1920s economy boomed for consumer industries and early stock holders.
With the roll back of regulations and a new set of consumer goods, the US boomed. Companies were able to make large sums of money and consumers were able to use credit for the first time to purchase new products for the home. Electric appliances and cars became popular for purchase with credit. Those investing in stocks for these companies were able to make a lot of money early in the 20's and good investors got out before the crash of 1929.
Farmers fell to harder times in the early 1920s with overproduction and no global market to sell goods to. They experienced issues with paying back loans and many lost their land.