Mobile chip titan Qualcomm faces setback with US antitrust ruling

Smartphone chip giant Qualcomm suffered a fresh blow in its antitrust battle as a US federal judge ruled that it "strangled competition" for years at the expense of consumers and device makers.Qualcomm shares sank some 10.8 percent Wednesday to close at a one-month low after the ruling that the company violated antitrust law, in a case with major implications for the smartphone market.US District Judge Lucy Koh ordered Qualcomm to change its pricing and sales practices, after finding it "engaged