Paul Zimmerman/Getty Images Entertainment Since my last Virtu Financial (NASDAQ:VIRT) article, the stock is up 65% while the S&P 500 returned 14%. It is one of my worst-performing articles in terms of readers on Seeking Alpha, but one of my best-performing stocks since publication. There is a lot of alpha in identifying high-quality stocks that are undervalued, especially if no one else is looking. The thesis remains largely the same, a sophisticated hedge focused on Virtu's ability to take advantage of ...