Indexing has become such a large part of the market that it can no longer be called passive investing, says financial historian Edward Chancellor, author of a definitive history of past speculative excesses, from the South Sea Bubble onwards, and a brilliant recent book, The Price of Time, about the folly of sustained low interest rates. This article is reproduced with the author's permission.  

Goodhart's Law is at work again Goodhart’s Law states that when a measure becomes a target, it ceases to be a good measure. The British economist Charles Goodhart came up with the idea in the mid-1970...