China, Russia, and Brazil are not the only entities betting against the U.S. dollar. The Invesco DB US Dollar Index Bullish Fund peaked last October at 30.36 and has fallen 8.6 percent since then. The opposite bet, the Invesco DB US Dollar Index Bearish Fund is up 11 percent over that same period. The dollar index generally follows interest rate differentials, and the Federal funds effective interest rate is likely to climb over 5 percent as of tomorrow’s Federal Reserve Bank announcement. It was nearly 40 percent lower last October. So if the interest rate is rising, why are speculators expecting a decline in the dollar’s value? The dollar valuation may have eased or reversed as speculators watch the Fed slow the pace of inter...