"There's no plans to impose investment restrictions on any countries that are interfering in any way with our country. "The whole idea that we're putting investment restrictions on the world - please discount that." The S&P Technology Index fell 2.3 percent, its biggest one-day fall in more than two months. The Philadelphia Semiconductor Index lost 3.1 percent as shares of chipmakers, which get much of their revenue from China, were pounded. Chipmaker Micron Technology, which gets half its revenue from China, lost 6.9 percent to $53.16, and Advanced Micro Devices fell 4.4 percent to $15.11.