Mortgage rates are generally changing daily. Some lenders will stabilize their rates more than others, but it is always wise to compare rates between lenders at the same time and on the same mortgage type. It is also important to know that when a lender provides you with a rate, it is not a guarantee that tomorrow, the rate will still apply. Until you have chosen a mortgage and lock your rate in place with the lender, fluctuations can occur. As with any financial decision it is important to do your research and understand what you are getting into. It's always wise to consult with your lender for personalized advice. Typically, if you have more money up front, you have to borrow less, and you reduce the risk for the lender and your cost for the loan.When the Federal Funds Rate is high, banks are able to borrow less money and the money they do lend is at a higher rate. There are several things that a lender can examine when determining your mortgage rate. One key factor is your credit score. A higher credit score makes you less risky to lend to and can significantly improve the rate you have to pay. This is because there are also other factors which determine an individual's mortgage rate, and why they different people will have different rates.Basically, the Federal Funds Rate is a large determinant of what the mortgage rate will be on a given day. And the Federal Funds Rate is largely determined based on the market including factors such as unemployment, growth, and inflation. Because loans are more inexpensive, people are more likely to use them to invest in capital.