The Shanghai Stock Exchange (SSE) warned record trading volumes may threaten its electronic trading system, according to the South Morning China Post. Turnover for trading in 2006 reached US$6 trillion, with benchmark indices rising more than 130% last year. Trading volumes hit record highs this week. Although outdated technology may contribute to possible glitches in trading, SSE officials said they are working on possible upgrades to the system. "We must pay close attention to risks in the market, most importantly whether the technology system and trading platform will be able to handle such large trading volumes," the governor of the exchange, Geng Liang, said in a released statement.