For Creators of Giant Oil ETF, Troubles in Market Began a Decade AgoBookmarkMay 20 2020, 4:30 PMMay 20 2020, 6:11 PMMay 20 2020, 4:30 PMMay 20 2020, 6:11 PM(Bloomberg) -- For ordinary investors, it was perhaps the most spectacular demonstration of the unique perils of trying to wager on the price of oil.Disclaimer