NEW YORK (ETF Expert) -- Money managers like myself may not discuss it often, but they probably have an "Uh Oh Indicator." What is it? When certain clients ask why any amount of cash rests in money market accounts -- why more of the money is not being committed to the stock benchmark du jour (i.e., Nasdaq in 1999, MSCI Emerging Markets in 2007, S&P 500 in 2014) -- unsavory greed is supplanting cautious enthusiasm. Granted, there is nothing scientific about an "Uh Oh Indicator" sounding its bell.