Shares and ADRs of Taiwan Semiconductor (TSM) are trading in the hole on Wednesday morning, after former US President and current Republican nominee for President Donald Trump told Bloomberg News in an interview that Taiwan "stole our chip business" and "should pay for defense." Trump referred to the US as something of an "insurance compan"y in its relationship with Taiwan. Under the Taiwan Relations Act, the US would consider any effort to subjugate Taiwan by other than peaceful means as being of grave concern allowing the US to provide weapons to Taiwan and to maintain the American capacity to resist any attack that jeopardized Taiwan's security. The US has more or less been the unofficial or sometimes official guarantor of Taiwanese security since Nationalist Chinese forces had retreated to and held the island province after losing mainland China to Communist Chinese forces in 1949. Since the end of that civil war, Beijing has claimed sovereignty over the island province and has threatened the government in Taipei with hostility for as long as it refuses to submit. Conversely, Taipei still claims the mainland as well.