We keep waiting for the bust, the gigantic rollover of oil companies that just plain collapse under their own weight and the $50 price that you get for West Texas Intermediate. It hasn't happened. We keep waiting for the junk bond market that is riddled with $200 billion in oil and gas paper to be crushed by defaults and restructurings. It hasn't been. In fact, the iShares iBoxx $ High Yield Corporate Bd, the high-yield exchange-traded fund that includes a lot of this suspect paper, is pretty much unchanged for the last three years and has enjoyed a sustained rally...