The M2 money supply includes cash, checking accounts, savings accounts, and other liquid assets that can be easily converted into cash. When the M2 money supply increases, it can stimulate economic activity by making more money available for borrowing and spending. This can lead to lower mortgage interest rates as well, as banks have more funds available to lend out. However, if the M2 money supply increases too rapidly, it can lead to inflation, which can cause mortgage interest rates to rise. The M2 money supply can have a significant impact on the cost of a home mortgage as well as home prices.