Mainland China’s insurance companies have emerged as major cornerstone investors in Hong Kong initial public offerings (IPOs) as they seek higher returns and benefit from Beijing’s policy support for insurers to invest in equity markets.Ping An Insurance (Group), Taikang Life Insurance, New China Life Insurance, Dajia Life Insurance and China Post Life Insurance were among the key players that invested more than US$250 million across about 11 IPOs so far this year, according to UBS data.Their...