Many (including this very site) have pondered the meaning behind and impact of Google's acquisition of Motorola. But credit ratings agency Standard & Poor's has decided it thinks the tech giant made a mistake, reports the Associated Press. "Standard & Poor's is saying investors should sell Google's stock because it believes the search leader's decision to buy Motorola Mobility increases the risk to the company and its shares." While the deal includes many patents, which would help Google defend itself against rivals, the ratings agency thinks possible intellectual-property issues remain.