Bloomberg Intelligence's Paul Sweeney weighs in on Twitter cutting nine percent of its workforce. Seth Masters, chief investment officer at Bernstein Global Wealth Management, says bond investors should shorten duration as long-duration debt faces price risk with rising interest rates. Ira Jersey, senior portfolio manager at OppenheimerFunds, says he is overweight on emerging markets and bullish on Brazil. Ken Sena, managing director at Evercore ISI, comments on Twitter's earnings and the AT&T and Time Warner merger.