Stocks gave up some of their gains after Greece Prime Minister Alexis Tsipras told citizens to vote 'no' in its July 5 referendum. Tsipras' speech on Wednesday urged citizens to vote against spending cuts in its referendum on July 5. He denied the referendum is a vote about exiting the eurozone and said a 'no' vote will give him more leverage in negotiations with creditors. The Prime Minister also said he remains at the negotiating table and is 'fighting to protect people's pensions.' But Greece's creditors may not be open to budging on pensions, which could increase Greece's deficit. Meanwhile, crude prices slipped over 2.5 percent on Greece worries, trading at $57.96. Plus, Macy's (M) said its ending its relationship with Republican presidential candidate Donald Trump following controversial comments the billionaire real estate mogul made about Mexico. Macy's sells Trump-branded menswear. Shares rose just slightly. TheStreet's Scott Gamm reports from New York.