Silicon Valley, Wall St drive wealth gap in US

There are several ways to measure the growing US wealth gap, but almost any way you look at it, the rich are getting richer.

Of the nation’s 100 largest metropolitan areas, the Bridgeport in Connecticut, which includes nearby Stamford and Norwalk, has the largest gap between rich and poor, according to an analysis by Bloomberg.

Bloomberg ranked cities on the difference between the top 20% of wage earners and the bottom 20% in average household income.