After-tax Yield. You need to choose between investing in a one-year municipal bond with a 0.04 yield and a one-year corporate bond with an 0.09 yield. If your marginal federal income tax rate is 0.27 and no other differences exist between these two securities, which one would you invest in? For the answer, enter the after-tax yield that you will ultimately get once you choose the best bond. Enter the answer as a decimal using 4 decimals (e.g. 0.1234).