"I have completed significant research on this topic and have found that with interest rates at low levels, bond yields trend lower, and their inverse relationship with bond prices means that most fixed-income instruments post sizeable price gains. For example, according to an article I recently read on Investopedia.com; If policy is accommodative for too long, inflation concerns may send bonds sharply lower as yields adjust to higher inflationary expectations. Cash is not king during periods of accommodative policy, as investors prefer to deploy their money anywhere rather than parking it in deposits that provide minimal returns."