As the real estate lending cycle matures and lender competition increases, banking supervisors tend to worry. In particular, in the commercial and residential real estate sectors, we worry that borrowers could become increasingly speculative, buying beyond their means and hoping for asset price appreciation--whether they are buying for their own use or strictly for the sake of investment. We worry that competitive pressures could drive banks to lower their underwriting standards, implicitly encouraging such speculation. And we worry that, in the inevitable downturn, credit quality could deteriorate to the extent that some banks could experience significant losses.