A tax-exempt municipal bond with a coupon rate of 9.00% has a market price of 98.50% of par. The bond matures in 14.00 years and pays semi-annually. Assume an investor has a 18.00% marginal tax rate. The investor would prefer otherwise identical taxable bond if it's yield to maturity was more than_% Submit Answer format: Percentage Round to: 2 decimal places (Example: 9.24%, % sign required. Will accept decimal format rounded to 4 decimal places (ex: 0.0924))