BEIJING — The United States and China have begun formal talks on demands for market access for an investment treaty, officials from the two countries said on Friday, calling it a new phase in negotiations that could set the scope of an eventual deal.

The initial swapping of “negative lists,” which outline sectors that the world’s two largest economies deem closed to the other side’s investors, begins what is likely to be the most contentious stage of the Bilateral Investment Treaty (BIT) talks launched in 2008.  Read more…