Banks pouring money into technology funds, wealthy clients and institutions clamoring to get pieces of start-ups, expectations of stock market debuts building — as Wall Street’s machinery kicks into second gear, some investors with memories of the Internet bust a decade earlier are wondering whether this sudden burst of activity spells danger for the industry once again.
With all this exuberance, valuations are soaring. Investments in Facebook and Zynga have more than quintupled the implied worth of each company in the last two years. The social shopping site Groupon is said to be considering an initial public offering that would value the company at $25 billion. Less than a year ago, the company was valued at $1.4 billion.