Wisest of the crowds

I keep getting asked what will happen to home prices with the Federal Reserve lowering rates to banks. The question implies:

1. What is the relationship of cost of money to prices?
2. Can we identify trends and/or turning points based on this macro-economic variable?

The sub-prime crisis was not born of a real change in cost of money. Rather, it folded under its own weight as artificial borrowing conditions expired and came head-on with artificially inflated home prices. The recovery, on the other hand, may very well be born of a change in cost of money (at least the Fed Reserve is hoping as much).

I believe the past relationship of cost of money and prices is fairly strong and so we should probably consider it. However, the mortgage market is based on long-term MARKET rates (5 year, 10 year, and 30 year US Treasuries) and not DIRECTLY related to the short-term cost of money. Having said that, banks typically borrow short-term and lend long-term and so decreases in their short-term borrowing costs generally will lower mortgage rates - particularly if they WANT TO BE COMPETITIVE. Recently they have not wanted to lend and so lower rates just means increased banking profits. In essence, the Fed is using rates to improve the capitalization of banks. This will eventually flow back into the economy and hence to mortgage borrowers but the immediate impact is less clear.