Nate Anderson, 'activist' short-seller who has announced shutting down of his almost eight years old research firm Hindenburg, is under cloud for alleged links with hedge funds in preparing reports targeting companies, a Canadian portal said citing documents filed before a court in Ontario. In a cache of documents filed at the Ontario Superior Court of Justice in a complex defamation lawsuit, the head of Canada's Anson hedge fund, Moez Kassam said his firm has shared research "with a wide variety of sources" including Hindenburg's Nate Anderson. The Market Frauds portal said that court documents allegedly revealed that Hindenburg colluded with Anson while preparing a report. The preparation of bearish reports without disclosure of participation can be charged as securities fraud by the US Securities and Exchange Commission (SEC). While short sellers borrow a security, sell it on the open market, and expect to repurchase it for less money after their damning report against the compan