According to Bloomberg, the Shanghai Stock Exchange’s reign as the premier venue for trading Chinese equities is coming to an end. For the first time in at least a decade, China’s oldest bourse has lost its position at the top of turnover rankings for the nation’s four major trading venues. The new leader is Shenzhen’s Small and Medium Enterprise Board, a 12-year-old market for mostly non-state companies that first climbed to No. 1 on May 17. It has since jockeyed for position with the Shanghai, with both bourses handling about 180 billion yuan ($27.1 billion) of trades on average over the past five days.