(New York)

One of the big conundrums in markets is that while it is practically gospel to diversify into a wide range of securities and asset classes, some of the best and most famous investors do the exact opposite. As evidence, just consider the investing styles of Warren Buffett, George Soros, or Bernard Baruch. Forbes has published a piece examining this seeming disconnect, and provides some interesting insights. According to Buffett, “Diversification is a protection against ignorance … [It] makes very little sense for those who know what they’re doing”. Baruch adds, “It is unwise to spread one’s funds over too many different securities … Time and energy are required to keep abreast of the forces that may change the value of a security. While one can know all there is to know about a few issues, one cannot possibly know all one needs to know about a great many issues”.

FINSUM: Okay, a couple of points here. Firstly, those investors can afford the big losses that can occur with a concentrated portfolio. And secondly, since they invest for a living, they have the time to devote to deeply understanding each of their holdings. For the 99.99% of people not in that group, diversification has major benefits.