President Trump says the American economy is doing magnificently and we are "winning, big time, against China"—but one of the things still holding the economy back is the Federal Reserve chairman he appointed. In a pair of tweets Wednesday, Trump renewed his attacks on Jerome Powell, calling him "clueless" for raising interest rates "too much & too fast" in the past and being too slow to cut them now, giving other countries an advantage, CNBC reports. "Germany, and many others, are playing the game! CRAZY INVERTED YIELD CURVE!," Trump said. "We should easily be reaping big Rewards & Gains, but the Fed is holding us back. We will Win!" More:
- The yield curve explained. Fortune takes a look at the "Crazy Inverted Yield Curve" and why it is being blamed for the Dow's 800-point drop Wednesday. The yield curve is seen on a graph charting the maturity rates for the bonds a country issues, and while it generally slopes from right to left, "sometimes shorter-term maturities offer higher yields than longer-term ones, resulting in the curve sloping downward from left to right." This is generally seen around 18 months before a recession, and traders became jittery when the inverted curve appeared early Wednesday, with the interest rate on a 2-year Treasury bond slightly higher than the rate on a 10-year bond. The inversion, last seen in 2007, disappeared later in the day.