The US Treasury Department releases proposed COINS Act rules to tighten restrictions on investments in sensitive technologies On October 23rd, the US Treasury Department released proposed rules to implement the COINS Act, which plans to expand restrictions on foreign investment in AI, semiconductor, and biotechnology by some countries of concern. Some investments in the AI field that were originally eligible for declaration are planned to be prohibited from trading; High bandwidth memory, photonic chips, and radiation resistant chips in the semiconductor field are subject to restrictions; Biotechnology has been added as a key regulatory area. The proposed rule requires US investors to independently determine whether their trading partners involve restricted technology, and some public market securities, index funds, and small fund investments are proposed to retain exemptions. The rule is currently in the stage of soliciting opinions and has not yet officially come into effect.