John Tsang, Hong Kong’s Financial Secretary, called for an investigation into Sino-Forest (TRE.TSX) and said the company should come clean, Bloomberg reported. “The authorities need to look into whether there are some things more hidden in the analysis of this particular company, or the timing, which is sort of peculiar,” said Tsang, on a visit to Canada. “For the company itself, they need to come out and explain themselves to their investors…” Sino-Forest has come under heavy fire from regulators and investors after a report in June accused the firm of financial irregularities. Tsang also downplayed a report this week by Moody’s ratings agency (part of Moody’s, MCO.NYSE), which said that many mainland firms – including Sino-Forest, and some listed in Hong Kong – raised “red flags.” “Many of these companies who got into trouble today would not have been able to list in Hong Kong,” he said.