英国作家狄更斯在《双城记》的开篇中写道:It was the best of times，it was the worst of times，it was the age of wisdom，it was the age of foolishness，it was the epoch of belief，it was the epoch of incredulity，it was the season of Light，it was the season of Darkness，it was the spring of hope，it was the winter of despair，we had everything before us，we had nothing before us，we were all going direct to Heaven，we were all going direct the other way—
2020年终于过去了，人类社会面对新冠疫情的挑战步履沉重。过去一年全球市场也因此跌宕起伏，有赖于前所未有的刺激政策经历了又一次“过山车”。每逢岁末年初之时，各大金融机构、政策研究机构都有展望来年的传统，美国华尔街同样也有看“水晶球”的习惯。
“这是一个最好的时代，也是一个最坏的时代；这是一个智慧的年代，这是一个愚蠢的年代；这是一个信任的时期，这是一个怀疑的时期。这是一个光明的季节，这是一个黑暗的季节；这是希望之春，这是失望之冬；人们面前应有尽有，人们面前一无所有；人们正踏上天堂之路，人们正走向地狱之门”。
