Not outgoing US flows, incoming Chinese flows. Previously via Michael Pettis:
On July 31, 2019, U.S. Senators Tammy Baldwin and Josh Hawley submitted a bill “to establish a national goal and mechanism to achieve a trade-balancing exchange rate for the United States dollar, to impose a market access charge on certain purchases of United States assets, and for other purposes.” According to an earlier memo that further explains the bill:
The Competitive Dollar for Jobs and Prosperity Act would task the Federal Reserve with achieving and maintaining a current account balancing price for the dollar within five years. It would create an exchange rate management tool in the form of a Market Access Charge (MAC)—a variable fee on incoming foreign capital flows used to purchase dollar assets. The Fed would set and adjust the MAC rate. The Treasury Department would collect the MAC revenue. The result would be a gradual move for the dollar toward a trade-balancing exchange rate. The legislation would also authorize the Federal Reserve to engage in countervailing currency intervention when other nations manipulate their currencies to gain an unfair trade advantage.