Dear Fellow Numismatists: In November I announced that PCGS-certified coins would no longer be eligible for inclusion in the popular NGC Registry. I received many positive comments from those who have closely followed graded coin populations and prices. Others asked me, “Why? What is the difference between NGC and PCGS?” Let me show you. Over the last five years or so, I have noticed a perplexing trend at PCGS. There has been a dramatic increase in the grades assigned by PCGS for a wide range of coin types and, consequently, I believe that this has caused an extraordinary reduction in...