A trader wearing a 'Dow 25,000' hat Drew Angerer/Getty Images

The World’s Priciest Stock Market

It is impossible to pin down the full cause of the high price of the US stock market. That alone should remind all investors of the importance of diversification, and that the overall US stock market should not be given too much weight in a portfolio.

NEW HAVEN – The level of stock markets differs widely across countries. And right now, the United States is leading the world. What everyone wants to know is why – and whether its stock market’s current level is justified.

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