XenoPort Rises After Winning U.S. Approval for First Drug
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XenoPort Inc. had its biggest gain in Nasdaq trading after U.S. regulators approved its first product following more than a year of delays.
The Santa Clara, California-based company rose $3.58, or 56 percent, to $9.96 at 4 p.m. New York time in Nasdaq Stock Market composite trading, the largest percentage increase since the shares were listed in June 2005.