The Shanghai Stock Exchange (SSE) conducted a series of trading tests on Sunday to validate the performance of its trading platforms in handling large volumes of orders. The tests were successful, with the bidding system receiving 270 million orders, which is double the historical peak and three times the number of orders submitted on Friday. The overall performance of the system during the testing was normal. The tests come after transaction problems at the end of last week caused significant losses for quantitative hedge funds. The SSE is also discussing the expansion of its facility, with a decision expected soon. If approved, another stress test will be conducted on October 6. The bourse's trading system experienced a delay on Sept. 27.