The U.S. dollar index is a basket of six major world currencies stacked up against the U.S. dollar and rolled into an index. The USDX has just hit a 20-year high, as U.S. Treasury yields are rising and outpacing the rising bond yields of most other major economies. The appreciating greenback suggests the dollar is still the king of the currency world and still a safe-haven currency during troubled times. The strong dollar also makes U.S. raw commodities more expensive to purchase on the world market. Stay tuned! —Jim Wyckoff