Which factors could lead to an increase in a borrower's mortgage rate?

A drop in credit score can lead to an increase in a borrower's mortgage rate because lenders typically view credit scores as a key indicator of a borrower's risk profile. When a borrower has a lower credit score, it suggests that they may be a higher risk for defaulting on their loan. As a result, lenders often charge higher interest rates to compensate for this increased risk. A higher mortgage rate can significantly impact the total cost of the loan over time, making it essential for borrowers to maintain good credit to secure more favorable rates.

On the other hand, an increase in income might lead to more favorable lending terms, as it often indicates a better ability to repay a loan. A decrease in property value can affect the equity and the overall assessment of the collateral backing the loan but doesn’t inherently mean the mortgage rate will increase. Similarly, a lower loan-to-value (LTV) ratio typically results in a more favorable interest rate because it indicates less risk for the lender, as the borrower has more equity in the property.