BOSTON ( TheStreet) -- The S&P 500 has rebounded 5.4% so far in September, following a 4.7% drop last month. Those individuals who are underinvested in equities and hoping to catch the next wave of upside should consider the following 10 stocks, which receive top ratings from analysts and are expected to gain at least 50% in the months ahead. Warning: These stocks are risky. They are ordered by analysts' median projected return.

10. Visa ( V) is a credit-card company, operating an electronic payment network. Fiscal third-quarter net income declined 1.8% to $716 million, or 73 cents a share, as revenue grew 23%. The operating margin rose from 50% to 56%. Visa's stock trades at a forward earnings multiple of 14 and a book value multiple of 2 -- 12% and 72% discounts to IT services peer averages. It is expensive based on sales and cash flow per share. Of analysts covering Visa, 34, or 89%, advise purchasing its shares, three recommend holding and two suggest selling them.

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