Asian stocks closed mostly higher on Wednesday as fears of a Grexit receded and a historic nuclear deal announced between Iran and major world powers paved the way towards possible peace in the Middle East. A raft of upbeat Chinese data also helped spur appetite for risk ahead of Federal Reserve Chair Janet Yellen’s semiannual testimony on monetary policy to the U.S. House of Representatives later in the day. Greece remained in spotlight ahead of a critical Greek parliamentary vote on the widely unpopular measures.