Hong Kong Exchanges & Clearing, the world’s biggest stock exchange by market value, has suspended trading for six companies including HSBC (HBC.NYSE, HSBA.LON, 0005.HK) after its website for corporate filings was disabled by hackers, Bloomberg reported. The exchange suspended trading to ensure that investors had equal access to price-sensitive statements made by the six companies, which also included Hong Kong Exchanges (0388.HK), Cathay Pacific (0293.HK), Dah Sing Banking Group (2356.HK), Dah Sing Financial Group (0440.HK), China Resources Microelectronics (0597.HK) and China Power International Development (2380.HK). HSBC, Hong Kong Exchanges, Dah Sing Banking and Dah Sing Financial said that they will resume trading today, while the other companies have not yet commented. HSBC makes up 15% of Hong Kong’s Hang Seng Index, while Hong Kong Exchanges accounts for 2.6%. Both the Technology Crime Division of the Hong Kong Police’s Commercial Crime Bureau and the Securities and Futures Commission are investigating the attacks.