One day ahead of Yahoo’s second quarter earnings report, a financial firm has suggested that investors give the company their support – and their money.  ThinkEquity upgraded its rating on Yahoo from "Hold" to "Buy."

So much for the "buy and hold" approach to investing, at least where Google and one analyst is concerned.  It might be time to sell and get some cash, instead, as ThinkEquity’s William Morrison has downgraded the search giant’s stock from "accumulate" to "source of funds."