Ultra-short funds deliver the worst of two worlds

MarketWatch Stupid Investment of the Week show

Summary: Ultra-short bond funds are designed to occupy a spot on the risk scale between money-market funds and short-term bond funds, but MarketWatch Senior Columnist Chuck Jaffe says they are really between a rock and a hard place, not as safe as cash investments, not yielding as much as short-term bond investments. That's why he's made the entire category of funds his Stupid Investment of the Week.