While shutdowns can concern investors for several reasons, the most recent shutdown in December 2018, which lasted 34 days, did not lead to a market downturn. The good news is history says shutdowns have little to no effect on them,” said Ryan Detrick, chief market strategist at Carson Group, in a statement. Although a government shutdown brings added uncertainty to the markets, most shutdowns do not last long enough to have a major impact on the economy. The report, which provides data for unemployment in September, is set to be released on Friday and is regarded as important for assessing labor market conditions. The ADP National Employment Report, an independent monthly report on private sector employment, showed September was another weak month for employment.