A pedestrian talking on a smartphone looks at an electronic stock board displaying the Hang Seng Index, left, and the Shanghai Composite Index outside a securities firm in Tokyo, Japan, on Tuesday, Aug. 25, 2015. Chinese shares plummeted to extend the steepest four-day rout since 1996 on concern the government is abandoning market support measures. Photographer: Tomohiro Ohsumi/Bloomberg via Getty Images