Stocks fell and bond yields slid on Tuesday in Asia with investors ducking for cover as new U.S. tariffs on Canada, Mexico and China took effect, threatening to escalate global trade tensions. The risk-sensitive Australian dollar slid and crude oil wallowed near 12-week lows, while bitcoin languished around $86,000 after erasing the surge to the cusp of $95,000 that started the week. Sterling held close to a 1½-month high and the euro was also firm as European leaders drew up a Ukraine peace plan to present to Washington. Japan’s Nikkei dropped 1.6 per cent and Taiwan’s benchmark lost 0.5 per...