Twitter flew high in its first day of public trading, raising billions for the company’s founders and highlighting a growing exuberance rational for stocks and social-networking stocks in particular. Shares of Twitter traded between $45 and $47 in their first hours on the New York Stock Exchange on Thursday morning. At the stock’s $45.10 opening price on Thursday, Twitter had a total market value of more than $25 billion, making it worth more than companies such as Kellogg, Netflix and Whole Foods and twice the value of iconic aluminum giant Alcoa. Once it started trading, Twitter immediately got on track for an 80 percent first-day jump in its stock price, harkening back to the go-go days of the tech-stock bubble in the late 1990s. Twitter’s hyped IPO comes at a time when some market watchers are starting to warn of a new bubble forming in stocks. The Dow Jones Industrial Average and Standard & Poor’s 500-stock index are at record highs, and the tech-heavy Nasdaq is at its highest levels since early 2000, just after the tech bubble burst. Investors must therefore grapple with the fact that the hyperactive social network has not yet figured out how to make any money. It lost nearly $65 million in the quarter that ended in September, nearly three times the loss it suffered in the same quarter in 2012. The appetite for Twitter’s shares, however, is a sign that investors have faith in the company’s ability to find a way to spread its wings and steer itself into a #profit!