The banking and finances market keeps changing. This is because the central bank of a country may change its policies in annual reviews or there is an influence of international market on local banking industry. If you have a loan and are looking to replace it with a new loan for whatever reason, then the topic mortgage refinancing will be of interest to you. Click here for more info.
However, don't switch loans just because you are being promised a better interest rate as the market conditions will change again. Also, the new lender would charge you money for disbursing the new loan. You will pay processing fee and charges for documentation and credit checks. This type of refinancing is not useful when the new loan increases your risk. If you are going for lower interest rates while extending the time period of the loan, then you should realize that you would actually pay more money in the long run. Getting professional help before finally making the call would help you save more money, reduce risk and may free you earlier from the jumbo loans.