(Reuters) – Yahoo Incs shares fell 7.5 percent as the companys declining revenue tempered investor confidence in CEO Marissa Mayers turnaround efforts, prompting several analysts to cut their price targets on the stock. Yahoos shares nearly doubled in the past year as investors pinned their hopes on Mayer and surging growth at Chinese online retailer Alibaba, in which Yahoo holds a big stake. At least four brokerages lowered their price targets on Yahoos stock, which fell to a low of $35.30 in early trading on Wednesday. Yahoo on Tuesday reported a decline in online advertising prices and slower growth at Alibaba.