Changes in interest rates can affect the division of mortgage-related assets in a divorce settlement. For example, if interest rates increase, the value of the mortgage debt may decrease, potentially impacting the distribution of assets and liabilities between the parties. Conversely, if interest rates decrease, the value of the mortgage debt may increase, influencing the division of assets. It's important for both parties to consider these factors and consult with financial and legal experts to determine the fairest and most equitable division of assets.

Changes in interest rates can affect the division of mortgage-related assets in various ways 

1. Duration: When interest rates rise, the duration of mortgage-backed securities (MBS) tends to extend, and when rates fall, duration shortens. This is because MBS are negatively convex, meaning their durations change in response to interest rate changes.

2. Prepayment risk: Rising interest rates can reduce prepayment risk, as homeowners are less likely to refinance their mortgages when rates are high. This can lead to slower prepayments and higher realized yields on MBS.

3. Supply technicals: Higher interest rates can improve supply technicals by reducing housing affordability, which can lead to a decline in new home sales and, subsequently, a decrease in MBS net supply.

4. Convexity event risk: Large and rapid changes in interest rates can trigger a "convexity event," where mortgage hedging flows lead to a reinforcing feedback loop, causing rates to rise further and potentially widening swap spreads.

5. Investment portfolios: Rising interest rates can affect the value of mortgage-related assets in investment portfolios, with higher rates potentially leading to lower bond prices and higher yields.