Things are looking pretty good for the average American investor at the moment, with the S&P 500 still taking out new highs and a 27.3 percent YTD gain rivalled only by Russia’s RTS Index 39.2 percent return over the timeframe on the global arena. Rising stock valuations are awesome for investors holding stocks in their portfolios--but not so great for those holding cash waiting for good entry points. For investors who prefer to go shopping for bargains when there’s blood in the streets, the good news is that in every bull…