The Mexican peso is wrapping up the worst week in almost four years as a surprise election outcome sent traders rushing to unwind one of the most crowded positions in global currency markets. The peso tumbled more than 5% after the ruling party’s unexpected landslide win in congressional races stoked fears that lawmakers could pass reforms that will erode checks on power and increase interference in the economy. In just one week, it went from being one of this year’s top performing currencies to become one of the worst. “It is no longer the risk of what they can do, it is the anticipated reaction to what they are ... (full story)