Fannie Mae the largest US mortgage- finance company will raise a fee it charges lenders to buy their mortgages or guarantee home-loan securities, a move that may increase costs for borrowers. Fannie Mae’s “adverse market delivery charge ... Moreover, asking your lender whether a rate if fixed or adjustable is important when you're on the look out for the best mortgage rate. Remember that adjustable rates, despite their low interest rates, might not have the best mortgage rates. Adjustable rate mortgages only have low interest rates in their first year, after which, rates either tend to go up or go down.
