Chinese financial data providers, including Wind Information Co, have stopped providing key corporate information to overseas clients in recent months. This underscores the growing difficulty faced by foreign firms when seeking sensitive information from Beijing. The change is due to regulatory requirements, said several anonymous insiders. The registry databases of Qichacha and TianYanCha have also been inaccessible to non-mainland China users for some time, others added. Wind has in excess of 200 million entries on its database. While some foreign firms are still able to access data from Wind other than the registry, compliance issues have prompted the company to restrict subscriptions of unidentified overseas clients, according to the Wall Street Journal. Global investors have grown more cautious on China, despite improving economic fundamentals, with the MSCI China Index down around 17% from its January peak.