When should I "lock in" an interest rate?
Have a mortgage broker help you make this decision. Many locks can expire after 30 or 45 days and depending on where you are in the buying process you might want to lock in right away. The rates could get higher if you wait and you might be disappointed to find that out. Also consider the fact that the market is unpredictable you never know what the rates will be tomorrow so your best bet is to lock in while you know the numbers.