(CNBC) The growing wealth gap between the richest and poorest Americans is increasingly creating a shopping chasm between those who are trading up and those who are trading down, experts say. What’s missing is the middle.

“There is a two Americas kind of thing going on,” said Chris Christopher, director of U.S. and global consumer markets for IHS Global Insight.

The result is a retail marketplace in which even basic goods like socks and razors are becoming either incredibly cheap or extremely expensive, experts say.

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