I went through the same thing last december Charlie.
Had a big lump of cash sitting in a MM account losing ground to inflation.
I "knew" the market and most asset classes were overvalued. I "knew" that DCA'ing and lump summing both carry lots of facts and figures and the right thing to do according to those was dive right in.
But I still think theres something about wrapping some bargain shopping mindset about getting into an asset class...once i'm there i'm in and done.
I did REITS in early january even though they were run up, because I moved money from another fund that was similarly run up. I figured, REITS could and probably will drop a little, but I'm losing gained ground if they do, not losing ground period. They went up another 10% and now are off 8, putting me up 2. If they decline another 10-20%, thats ok, they'll bounce back in a year or two.
Then again, I also bought them in my IRA, and wont be touching that for almost 20 years, so it wasnt really THAT brave of a move.
I'm still holding the bulk of that cash in a high dividend, low volatility fund...and I like it there and can live off the dividends...but if prices fall and/or dividend spreads improve in some asset classes like stocks, GNMA's, or high yield corporates, I would divest some of that holding in those directions.
So it was kind of a half move. Better than a MM considering its paying almost 4% and has appreciated another 2% since 1/4. Probably wont crater this year, or until interest rates make a strong upside move. And if it does, the crater should be smaller than some.
Choice is of course yours. The statistics are sometimes wrong, they dont have a heart, and theres something in we bargain shoppers that makes us uneasy about paying top dollar for anything...