Performance chasing is one of the most common behavioral errors made by mutual fund investors and represents one of the most heavily traveled roads to poor investment results.  Now, when we use the phrase performance chasing it is universally understood that we are talking about chasing good performance. That is why we are so intrigued with TLT, this year’s fund flow leader among bond ETFs. The iShares 20+ Year Treasury Bond ETF has raked in over $20 billion in new assets this year, but not by posting strong results. Rather, inflows have surged despite returns that are frankly terrible. Such an incongruity deserves a closer look, and this study lays out some of the key storylines behind this surprising development.