I am asked frequently if stocks can continue to go up. Would that I knew. Bespoke Investment Group recently provided some insight as to where the current bull market ranks historically. Six years into it, this rally qualifies as the fourth-longest of the 33 Dow Jones industrial average bull markets since 1900.

Since the 2009 low, the Dow Jones industrial average has risen approximately 175 percent — the fifth-largest gain since 1900. That is a nice run, but Bespoke also notes that in the 1990s bull market, the Dow rose 400 percent. All the more impressive since interest rates were a good deal higher then

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