Trump has vowed the United States will soon put a "fairly substantial tariff" on semiconductors coming into the country, after previously threatening a 100-percent levy on the chips. He did not give a timetable or details for the new levy, which he has repeatedly threatened in the past, to be enacted. Trump in early August sparked volatility in Asian chipmaker shares with talk of a 100-percent tariff on semiconductors from firms that do not invest in the United States. This as the United States and China are locked in a high-stakes race to develop the high-end semiconductors used to power artificial intelligence systems.