India-based stocks suffered some turbulence this week after the central bank issued an inflation warning Tuesday and Cognizant Technology Solutions (CTSH) on Wednesday reduced its full-year revenue outlook. By Thursday, the Bombay Stock Exchange’s benchmark Sensex index was down a fraction for the week. The index is ahead little more than a half-point since June 30, but 2.5% off a July 24 high. Cognizant, a U.S.