>I believe the bias of the type poster DewDiligence points out exists and I believe the bias of the type poster iwfal points to also exists.< Iwfal and I were referring to the same bias. >I think most people investing in DNDN believe they exist to varying degrees.< I respectfully disagree. I would bet that fewer than 10% of DNDN longs have ever even considered program-survival bias. As evidence of this I cite the myriad posts on iVillage which proclaimed that 9902b is a slam dunk based on the outcomes of 9901/9902a. Regards, Dew