Thursday (January 15) financial markets are like chocolate. You never know what color is next. If one color must be used to describe Thursday's market, many traders will answer that it is black. The Swiss central bank became the protagonist of the black swan on Thursday. The bank abandoned the three-year upper limit of the Swiss franc against the euro and cut interest rates again. In the foreign exchange market, the euro fell more than 2000 points against the Swiss franc, while the euro fell to an 11 year low. In the stock market, the Swiss stock market plunged 8.7%, the highest one-day decline since 1989. In the gold market, under the influence of risk aversion, gold prices soared to a four month high. In the crude oil market, oil prices fluctuated violently, with an amplitude of more than 8.5%, and finally fell.