U.S stock indexes are trading lower today as investor concerns take hold over escalated rhetoric and military threats between the North Korea and the U.S.. North Korea has warned it is considering a preemptive strike on a U.S. military base on Guam, a U.S territory in the region. This threat was a response to strong remarks from President Donald Trump in which he signalled North Korea would be met with “fire and fury like the world has never seen” if the DPRK continued its typical sabre-rattling. Consequently, geopolitical tensions have rotated back into the forefront of investor thinking.