us stocks opened lower monday declining amid concerns over an economic slowdown in china and a sign of manufacturing weakness in the us economy the dow jones industrial average djia and sp 500 spx were each trading down around 05 soon after the opening bell while the nasdaq composite comp slid 03 according to factset data at last check us economic data released monday showed the federal reserve bank of new yorks empire state business conditions index a gauge of the states manufacturing activity has plunged into negative territory this month us stocks booked gains last week with the sp 500 and nasdaq notching their longest weekly win streak since november 2021