A man holds laptop computer while waiting to cross the street in San Francisco, California, U.S. (Photographer: Michael Short/Bloomberg)
(Bloomberg Businessweek) -- Early investors and employees at Uber Technologies Inc., Lyft Inc., and other tech companies are getting a double reward this year: a wave of initial public offerings that puts billions of dollars in their pockets, and a quirk in the law that means some of that money will be tax-free.