Investors often turn to recommendations made by Wall Street analysts before making a Buy, Sell, or Hold decision about a stock. While media reports about rating changes by these brokerage-firm employed (or sell-side) analysts often affect a stock's price, do they really matter?Let's take a look at what these Wall Street heavyweights have to say about Coca-Cola (KO) before we discuss the reliability of brokerage recommendations and how to use them to your advantage.Coca-Cola currently has an average brokerag ...