Lingjun Investment

Lingjun Investment  (Lingjun; ) is a hedge fund management firm founded in 2014 that is headquartered in Beijing. It is one of the largest quantitative funds in China.

Background
Lingjun was founded in June 2014 by Cai Meijie who had previously worked at China International Capital Corporation and Penghua Fund Management. Its Chief investment officer, Ma Zhiyu had previously worked at Millennium Management, LLC. According to the Asset Management Association of China website, the main owner of Lingjun is Cai Jianliang however he does not hold a position within the firm nor is his profile mentioned. Ma is also another owner via ownership of the investment companies that own Lingjun's equity.

On 20 February 2024, the Shanghai and Shenzhen stock exchanges announced that Linjun was banned from buying and selling shares for three days. This came as a result of Lingjun selling 2.57 billion yuan ($360 million) worth shares within a minute between 9:30 a.m. and 9:31 a.m on the day before. The benchmark indices such as the SSE Composite Index and SZSE Component Index rapidly declined as a result of the trades. A statement from the Shenzhen stock exchange stated Lingjun's selling orders amounted to "abnormal trading behavior" and the firm was already warned multiple times for the same reason.

One day after the announcement, Lingjun issued an apology on its website for the negative impact. It also sated it held long-term bullish views on Chinese stocks and will review the problems from the transactions. While Lingjun's suspension was not considered a significant problem, it was a further blow to confidence in Chinese quant funds as regulatory scrutiny increased.

Prior to the ban, Lingjun's year-to-date returns from the start of 2024 were poor and had underperformed the CSI 300 Index.