Vetr Top Raters Upgrade Yahoo And Viacom To 4.5-Star Stocks By: Benzinga via Benzinga February 08, 2016 at 11:31 AM EST Shares of Yahoo! Inc. (NASDAQ: YHOO) have lost nearly 20 percent since the start of 2016 and nearly 40 percent over the past year. ... Read More >> Related Stocks: Viacom Yahoo