Businessman analyzing candlestick chart and stock market graph on digital dashboard, Showcase financial analysis, Trading strategy and investment trends in modern fintech and portfolio management.getty I’m sure you’ve noticed that the media has been fretting about a selloff in the last few weeks. But the S&P 500 is still up a lot on the year.Even so, there is cause for concern about overvaluation, as the market’s current gain is equal to a whole year’s worth of historical returns, on average. But the softne ...