Investors are pushing the world’s most expensive currency to ever more dizzying heights, shrugging off the risks from interest-rate cuts, divisive elections and analyst warnings. Mexico’s peso is the world’s best-performing major currency this year and the highest ranked on a list of real effective exchange rates — a measure of a nation’s competitiveness — compiled by the Bloomberg. According to Deutsche Bank, that rate is now at its highest in Mexico since at least 2005. The rally has proved so relentless — blasting past milestone after milestone — that investors are now afraid to bet against the currency, despite ... (full story)