(Yicai) Sept. 30 -- The test the Shanghai Stock Exchange ran on its auction platform after experiencing a trading delay attracted double the amount of transactions than the previous peak, a source reportedly said.

The test carried out yesterday achieved a total of 270 million transactions, which was double the peak and three times the number of orders received on Sept. 27, the day stock trading experienced delays, a source told The Paper today.

The SSE announced on Sept. 27 that its auction platform recorded abnormally slow transaction confirmation, which caused delays. To find out the cause of the issue, the bourse said it would carry out a stress test over the weekend.

"It is normal for stock exchanges to run tests during the weekend," according to a staffer at the technical department of a brokerage firm based in eastern China. "Yesterday's test in particular was taken for a trade anomaly."

No issue was found during the test, but the SSE refused to disclose to the brokers involved the reason behind the issue on Sept. 27, the staffer noted.

However, market insiders believe that the anomaly recorded on Sept. 27 was due to increased orders. In fact, the new stimulus package to support economic growth released by the Chinese government on Sept. 24 boosted investors' confidence and led Chinese mainland stock indexes to rally.

The turnover of the Chinese mainland stock market 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 Sept. 27.

Editor: Futura Costaglione