#IPOpop

Twitter jumped about 93 percent from its IPO price shortly after the market opening, although the company's first-day return will likely end up somewhat lower than that based on the closing price. Of course, this IPO pop is nothing like the 1999 experience, with 25 IPOs up by more than 225 percent on the first day. Of course, we hope for Twitter investors that their long-term results are better than the performance of many of these companies. For example, an internet search for Value Software Corp., which experienced the biggest 1-day return of 697.50 percent, returned no results. And Foundry Networks, which had a first-day valuation of about $9 billion, was acquired in 2008 by Brocade Communications for $2.6 billion.