Adjustable-rate mortgages (ARMs) are becoming more popular as the average rate for a 30-year fixed-rate loan has climbed to the highest rate in 23 years. ARMs offer a fixed rate for a set period, typically five, seven, or ten years, after which the interest rate resets to current market rates. Since the foreclosure crisis, ARMs have become less risky with stricter regulations and more transparency. ARMs...