U.S. stock markets set record, marking longest bull run

U.S. stock markets set record, marking longest bull run
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U.S. stock markets set a record Wednesday, marking the longest bull run in history.
The record set by the S&P 500 Wednesday extends a surge in stock markets since it bottomed out on March 9, 2009, a low-point of the Great Recession. The index had on Tuesday tied the previous record-holding bull run set by the dot-com boom in the 1990s.
In the 3,453 days since then, both the Dow Jones Industrial Average and the S&P 500 have surged to record highs, roughly quadrupling their value.
The Dow has grown from just over 6,500 to a peak of over 26,000, while the S&P has expanded from a nadir of 676 to well over 2,850.
Though the market has fallen on numerous occasions over the past nine years, none of the drops have reached 20 percent, which is what stock-watchers consider a bear market.
But history may yet snatch the record from the stock market. Because stock prices peaked in January, a sudden downturn could cause historians to revise their views and decide that the bull market had met its end then. 
While corporate earnings remain strong, some analysts see looming danger in escalating trade wars and downturns in emerging market that could spread.