You buy a 4-year, 5%, 1,000 bond that is selling at a YTM of 6%. Interest is paid annually. Assuming you hold the bond until maturity and are able to reinvest the interest payments received over the life of the bond at an annual rate of 4%, what would your Realized Compound Yield be over the period you held the bond, and why does it differ from the YTM rate when you bought the bond