To boost economic growth, not only have central banks of countries like Japan and the EU been making substantial purchases of financial assets, injecting a large amount of liquidity into the market, and maintaining near-zero ultra-low interest rates, but they have also increased the policy to negative interest rates. So far, the central banks of Denmark, the European Central Bank, the Swiss National Bank, the Riksbank of Sweden, and the Bank of Japan have successively implemented negative interest rate policies. The Governor of the Bank of Japan has further indicated that the Bank of Japan may further lower the deposit rate from the current -0.1% if necessary, to influence spending and investment and combat deflation. Moreover, the Federal Reserve has also been forced to pause its rate hike, with some Fed officials, including Chair Yellen, beginning to discuss the feasibility of negative interest rates. Last November, Chair Yellen stated that negative rates are not needed at present but would not be ruled out. There is even talk that if the economic situation deteriorates, the Fed might implement QE4. The world's more lenient monetary policies, especially after the Federal Reserve's failed attempt to "shear sheep" through forced rate hikes, have kept the pace of further hikes steady, affecting global funds to flow into gold, commodities, and other areas for safety. The US dollar index has fallen, which to some extent has affected the rise in prices of oil, iron ore, and precious metals, particularly as global iron ore and energy prices have hit bottom and begun to rise, supporting the bottom of weathering steel prices.