Europe's financial problems are pushing U.S. mortgage rates lower and lower.

Because international investors see the U.S. as in much better shape than Europe, investors are putting their money into U.S. government securities, driving mortgage rates down near record lows.

Some in the industry predict that rates could be as low as 4.5 percent this summer, although some warn that this may come with lots of volatility as investors jump in and out of the market.

Not long ago, many experts were predicting that rates were likely to rise to at least 6 percent by this fall since the Federal Reserve stopped buying mortgage securities.