Kristen is CNBC's markets producer. She tracks and quantifies market trends for live coverage from the floor of the New York Stock Exchange. Prior to joining CNBC, Kristen was an equity capital markets reporter at Bloomberg. She was also a contributor and researcher at footnoted, where she dug though SEC filings and broke news on material information. Kristen graduated cum laude from Northwestern University's Medill School of Journalism.
Investors are celebrating the second strongest bull run since World War II.
Demand for small-cap stocks is increasing relative to established large-cap names.
With stocks up, short interest reached the highest level in 20 months, but some investors see the trend as a bullish sign.
Since the S&P 500 closed at a 3½-month low of 1,741.89 on Feb. 3, 2014, the index is now up 6 percent.