Gundlach, who oversees $100 billion at the Los Angeles-based DoubleLine, also said the Tesla-SolarCity deal is "a complete confidence destroyer" for Tesla Motors (TSLA) shareholders. Gundlach, whose DoubleLine purchased beaten-down European stocks a week ago, said in a telephone interview that the firm expects Britain to vote on Thursday to stay in the EU "so you want to sell on the pop. European stocks have been rising, so we are expecting one more push into the vote." Gundlach also chimed in on Tesla's proposed acquisition of SolarCity (SCTY), which Tesla's Chief Executive Officer Elon Musk called a "no-brainer." "This is a poor idea for Elon Musk," Gundlach said. "This is damaging to his reputation and to the way he operates." Gundlach, known on Wall Street as the 'Bond King,' said Wednesday that the Tesla-SolarCity deal wreaks of "bad corporate governance.