'Global markets fell Tuesday after China unexpectedly devalued its yuan currency amid weaker economic growth.
Beijing's devaluation of the yuan allowed it to fall by its biggest one-day margin in a decade. The central bank said the 1.9% decline was due to changes aimed at making the way it sets exchange rates more market-oriented. The U.S. dollar also gained against the yen, Indian rupee, South Korean and other Asian currencies.'
http://americasmarkets.usatoday.com/2015/08/11/stocks-tuesday-23/