These stocks should be able to rebound strongly.

What goes up can come down. Most investors have experienced this first-hand with stocks in their portfolio. But can what comes down go back up? In many cases, the answer is a resounding yes.

Steep declines in share prices can often present great buying opportunities for long-term investors. I think such opportunities exist right now. Here are two beaten-down stocks with incredible upside potential.

1. UnitedHealth Group

Shares of UnitedHealth Group ( UNH 1.24% ) have plunged roughly 50% below the high from earlier this year. Pretty much everything that could go wrong for the health insurance stock has gone wrong.

In April, UnitedHealth Group announced disappointing first-quarter results and lowered its guidance for the full

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