US markets down markedly overnight amid a combination of some soft corporate earnings releases, fresh concerns around the Trump administration's ability to prosecute their economic agenda and yet another Islamist terror attack (in Barcelona) - Dow tumbled -274-points or -1.24% for its biggest single session decline since May 17, while the broader S&P500 shed -1.54% (its lowest close in over a month as information technology led all sectors lower).
