(Yicai) Sept. 30 -- The Shanghai Stock Exchange conducted an auction system test after an abnormal delay in trading on Sept. 27, doubling the previous record for the number of orders processed, a media report said.

Yesterday’s test hit 270 million orders, twice the previous historical peak and three times the number received on Sept. 27, The Paper reported today, citing a brokerage source.

The SSE announced on Sept. 27 that there was a delay in confirming trades on its auction platform, which affected trading that day. To find out what caused the issue, the exchange conducted a full systems test yesterday.

No issue was found during the test, but the SSE refused to disclose to the brokers that took part in the test the reason behind the Sept. 27 glitch, the staffer noted.

“It’s quite common for exchanges to conduct weekend tests,” a person in the technical department of a brokerage based in eastern China also told The Paper. “What makes this situation special is that it comes just after a trading anomaly.”

Market insiders believe that the anomaly was due to a higher volume of orders. In fact, the new economic stimulus package set out by the Chinese government on Sept. 24 boosted investor confidence and triggered a rally in Chinese mainland stocks.

Turnover on mainland stock markets exceeded CNY1 trillion (USD142.6 billion) in the past three trading days. The figure for the SSE alone was CNY480 billion to CNY524.4 billion (USD68.4 billion to USD74.8 billion) between Sept. 25 and 27.

Editor: Futura Costaglione