I agree for long-term investments a fund might be better (ex. in a retirement account mixed with equity funds) but if you bought those bond funds in the past few years and sold them you might not have made much of a return. For example in the past 1 year the price of VGSH went from 60.83 to 59.87 so you lost over 1% on the price change which cancels out most of the interest yield. My point is that for short-term savings in a rising rate environment this can work better.