we at thornburgh have used laddering for the last 20 years with our most popular fund and i think it's most effective if you use it over a number of years so that you get the yield of a long-term bond or an immediate-term bond and the risk of a somewhat shorter-term bond as the ladder ages and the bonds move closer to maturity. >> tom: we've noticed about the questions of quality of bond ratings. guys, how does that affect really how people should look at individual bonds for instance, john? >> actually, individual bonds and bond funds carry the same credit risk and one of the concerns our buyers have and why they buy individual bonds is bond funds they go to buy a a.a. bond fund. 5% of the securities in that fund may only be a.a. it's up to the discretion of the fund manager. in many cases they're purchasing lower credits to enhance the performance of the fund. >> tom: interesting you say that. george, how about that issue, about maybe lower quality bonds perhaps within that bond fund? >> well, i can't speak for all bond fund managers, but we look beyond the rating agencies and i thin