S&P futures down 0.7%, near worst levels, following three-day bounce that came after second-biggest S&P selloff of the year on Monday. Asian markets mostly lower overnight. While Japan fared well, China was down nearly 2.5%. European markets mostly weaker. Treasuries firmer across the curve. Dollar lagging on risk-sensitive yen cross while better vs euro. Sterling weak. Gold flat. WTI crude up 0.8%.