Jill Goldsmith Co-Business EditorStocks, which had surged more than 500 points earlier in the day in a solid rally, reversed course suddenly and late in the session on dishearteninng news that Calliforina was reinstating a lockdown as COVID-19 cases continued to rise in the state.The DJIA had been up 564 points as earnings kicked off and as two drug companies, Pfizer and Germany’s Biontech, said they were fast tracked by the U.S.