Thousands of homeowners are facing the challenge of higher monthly mortgage payments. Specifically, those who took out adjustable-rate mortgages (ARMs) five years ago are now experiencing the unpleasant shock of significantly increased home payments. Unlike fixed-rate mortgages, ARMs offer a low introductory rate for a fixed initial period, but after that period, the rate adjusts periodically based on market conditions. For many ARM loan holders, this year marks the adjustment period, resulting in higher payments due to elevated mortgage rates.