Best Buy, the region's largest retailer, is riding an updraft. The electronics giant doubled its net earnings in the second fiscal quarter, reaching a total of $139 million, a huge leap from the $62 million reported for the same period in 2002. Earnings from continuing operations grew more than 75%, to $140 million, up from $79 million in the second quarter last year.
The Eden Prairie, MN–based retail chain enjoyed 17% revenue growth in the…