Hello Larry
These days many people are looking for a higher yield in the face of the paltry 2% or so the money markets provide.
In a way MM funds are more transparent, pegged at $1, you get the posted yield. I assume you know that as bond yields move higher your asset value drops. This yield and net asset value seesaw effect is most apparent if you look at a chart for (VWEHX) the high yield bond fund. The HY fund has a nice high 9% yield but YTD return is down over 2%.
You probably know all this basic stuff, just trying to cover all the bases.
Fred