Ultra-Short Bond Fund
  
Ultra-short. As in verrrrrry short duration to maturity bonds. Like a week. A month. A few months at most.
An Ultra-Short Bond Fund looks a lot like a money market fund, or even a bundle of CDs, but because it invests in tag ends and corporate bonds where, yes, one in 10,000 don't pay off...these funds carry a skosh more risk, and thus more reward, or interest on the invested money.