Oi SA (ADR) (NYSE:OIBR) investors weighing a merger with Portugal Telecom SGPS SA got opposing recommendations from the two biggest shareholder advisory firms, setting up a showdown in a vote on the deal later this month. Oi SA (ADR) (NYSE:OIBR) stock performance was 4.29% in last session and finished the day at $1.46. Traded volume was 11,791,818 million shares in the last session and the … Continue reading Investor’s Watch List: Oi SA (ADR) (NYSE:OIBR), BlackBerry Ltd (NASDAQ:BBRY), WPCS International (NASDAQ:WPCS), GTT Communications (NYSEMKT:GTT)