美股自1950年以来,历史数据显示,当标准500指数跌破200天均线时,4月份是该指数表现最强劲的月份之一,平均涨幅超过2%。Historical data on U.S. stocks since 1950 shows that when the Standard 500 Index falls below its 200-day average, April is one of the strongest performing months for the index, with an average gain of more than 2 percent.