8. BlackRock ( BLK) Company Profile: BlackRock is one of the country's largest investment managers. Average Return Since 2001: 7.1% Best September Performance: +19.9% in 2010 Worst September Performance: -10.5% in 2008 Analysts Ratings: Fifteen analysts, or 79% of those following the stock, say BlackRock shares are a "buy." Those firms include Credit Agricole and Wells Fargo. Another three say investors should hold onto shares, while one lone analyst says investors should sell the stock. The average price target of $217.21 means analysts expect the stock to rise an average of 31% from current levels.