To secure a mortgage in a market with fluctuating interest rates, consider locking in your rate early with a fixed-rate mortgage if you plan on staying in the home long-term. If you anticipate lower rates in the future, an adjustable-rate mortgage (ARM) might be a good option, though this comes with some risk if rates rise later. Shop around for the best deals, and consult with a mortgage advisor to choose the right loan type based on your financial situation and the current rate environment.