According to Bloomberg, the price-to-earnings ratio of the $标普500指数 (.SPX.US)$ 's 10 largest stocks is trading near a level that marked the implosion of the dot-com bubble two decades ago.
Elevated valuations combined with a potential rise in bond yields and risk of slowing growth make equities more vulnerable to corrections. And with the S&P 500 Index's top 10 biggest companies comprising nearly a third of the gauge'...