Dow Jones Futures: Pfizer Coronavirus Vaccine Rollout Woes Stall Stock Market Rally; DocuSign Earnings Strong Investor's Business DailyDow loses momentum and S&P 500 ends lower in last hour of trade Thursday as Pfizer said to slash rollout target for COVID-19 vaccine MarketWatchS&P Dow Jones Indices to launch cryptocurrency indexes in 2021 ReutersStock futures flat ahead of November jobs report CNBCBerkshire Hathaway Inc.