What happens when a lender locks an interest rate?

When a lender locks an interest rate, the rate is secured against market changes for a specified time. This means that the borrower is guaranteed to pay the locked-in rate, regardless of fluctuations in the market interest rates during the period of the lock. This is important for borrowers because it provides certainty about their mortgage payments and protects them from potential increases in rates before the loan closes. It typically involves agreeing to a lock period, which can vary in length, allowing borrowers to finalize their loan processing without worrying about shifting rates that could lead to higher payments.