Study Casts Doubt on Key Rate - WSJ.com

Interesting...Suppose you have two measures of something. One that is market driven (observable prices) whereas the other is based off reported data. Usually the two move together. However, when they diverge, someone must ask why and which is more correct.That is essentially what the WSJ did in the following article. They look at LIBOR and teh credit spread to gauge the level of uncertainity