As I announced last week I’m making a home purchase. I actually locked in a rate right before the Christmas, though I wish I locked in rate a week before I actually did. During the week of 12/3/2007 rates were some of the lowest we’ve seen in a long time. However at that time I hadn’t even agreed to a purchase price. I wasn’t comfortable locking in rate without knowing that I would actually be purchasing a place. Had I locked on December 5th when I started shopping around, I could’ve gotten a 15 year fixed rate mortgage for 5.25%. Instead I locked in rate of 5.5% for a 15 year or 5.875% for a 30 year mortgage.

While it’s probably not a good idea to “time” a mortgage rate, that doesn’t mean that a sense of timing isn’t important. Mortgage rates tend to track the 10 year U.S. bond (or the 30 year bond). Below are two charts. T he first chart is of rates for a 30 year mortgage from bankrate.com for the last three months.  The second chart is for the 10 year bond for the last three months from Yahoo Finance. Awfully similar wouldn’t you say?

Predicting where rates will go is difficult, but knowing that rates are good doesn’t have to be. There is natural bottom for interest rates - 0%. Nominal rates will never be lower than this. Below is a chart of the yield on the 10 year bond for the last 5 years.

You’ll never know if you’re at a bottom of a dip, but you can know that you’re in a dip. Generally speaking when buying there’s not really an opportunity to “time” the rate. The timing of the rate is generally determined by the circumstances of the purchase. Timing is much more important for a refinance. Given that even a no closing cost refinance actually does cost something, there’s something to be said for getting the timing right. The no closing cost refinance is only seemingly costless because the person refinancing gives up something on the interest rate. There’s inherent value in the option of being able to refinance at a later date.

This isn’t my first real estate purchase so I had experience with mortgage shopping. The previous experience with both purchasing and refinancing twice proved extremely helpful this time around both shopping for a rate and having a better understanding exactly what different trade offs were. You can look forward to a more extensive post on my mortgage shopping experience.