You spend your working years building wealth and putting yourself in a position to live off a comfortable retirement income.

The ranks of Americans who fall on the extreme ends of the income spectrum has been growing steadily in recent decades.

"Upper class" is one of those terms that everyone seems to aspire to, but there's no clear, one-size-fits-all definition.

When retirement planning, you should focus on accumulating wealth over the years and imitating financially savvy upper-middle-class individuals who build their nest eggs comfortably. Here are four ...

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