It's considered a leading economic indicator, meaning it's predicting what happens down the road, and many investors think that if coronavirus gets under control and people get increasingly confident about the economy in 2021.

股市被认为是一个领先的经济指标，意味着它可以预测未来会发生什么，许多投资者认为，如果新冠肺炎得到控制，人们对2021年的经济发展会越来越有信心。