1. Interest Rates 2. Inflation 3. Economic Growth When the Federal Reserve lowers its key interest rate (FEDERAL FUND RATE), it creates additional demand for Treasuries this leads to lower INTEREST RATE or Vice Versa. In inflationary environments, investors are forced to reach for greater yield to Compensate for Diminished Purchasing Power in the future. If the ECONOMY is growing at 5% and STOCKS are yielding 7%, few will buy Treasuries unless they are yielding more than stocks.