1. In the past decade, only three blue diamonds of 10 carats or more with the same vivid grading for intensity have been sold at auction, all weighing less than 12 carats and none flawless, he said.
2. The first chart shows the total incidence of banking, currency and debt default crises in emerging markets since the 1970s, set against the nominal federal funds rate. Mr Koepke gives this as evidence that high and rising rates typically precede periods of EM crisis.
3. For now, most of the activity around bitcoin is monetary in nature, so it makes sense that its critics point to volatility. Though the value of one bitcoin in U.S. dollars has fallen 67% in the past year, its value over the past two years is up 1,879%, according to the market price chart at blockchain.info. So whether it’s a good investment or a bad one is a matter of perspective.