#US: Noon: Indices trading lower in a choppy session. Johnson&amp;Johnson posted strong Q2 result; raised its full year outlook. Homebuilder's confidence boosted in July. US might impose travel ban on Chinese Communist party members. #DJIA -0.62% #SP500 -0.60% #Nasdaq -1.11%. https://t.co/Yf2HqCaELH