The 1987 crash and 2017 have very little in common: Stovall

The Dow Industrials propelled past the 23,000 level out of the gate early Wednesday. The Dow's historic rally comes on the eve of the anniversary of the worst stock market crash in US history. Market historian Sam Stovalland Chief Investment Strategist at CFRA explains why there are very few similarities between thy '87 crash and now.