(Source: Sparton Corporation) SCHAUMBURG, Ill.--(BUSINESS WIRE)--Jul. 2, 2013-- Sparton Corporation (NYSE: SPA) announced that it has joined the Russell 2000® Index according to the list posted July 1, 2013 on www.russell.com. The Russell 2000 Index measures the performance of the small-cap segment of the U.S. equity universe. The Russell 2000 is a subset of the Russell 3000® Index representing approximately 10% of the total market capitalization of that index. It includes approximately 2000 of the smallest securities based on a combination of their market cap and current index membership. Membership in the Russell 2000 Index, which remains in place for one year, means automatic inclusion in...
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