China’s back to business; US shutdown risk; Brexit bites

London (CNN Business)1. Back to business in China: Markets in mainland China zoomed higher Monday as investors returned from a week-long break for Lunar New Year. Trump has threatened to increase existing tariffs and enact a third wave of penalties on Chinese goods if the two sides can’t broker a permanent truce before the March 1 deadline. 2. US government shutdown (round 2): The United States is facing another possible government shutdown later this week. Budget talks between Democrats and Republicans ground to a halt over the weekend in a dispute over immigration policy. The disagreement appeared to dash hopes that a deal could be reached by Monday to allow each chamber of Congress plenty of time to pass legislation …