Toofuzzy, you make a good point. I ended up with 0% cash in 2002 and 2009. So then, there is no such thing as too much cash. There will always be a time when it's needed.
"You can always put some of the cash in a short term bond fund."
How about REIT's (Real Estate Investment Trust) that pay 10% annual return? Or are they too risky?