China's producer prices declined at the fastest rate in six years in August as commodity prices fell, adding fears that the world's second-largest economy is sliding into deflation and adding to expectations for further stimulus measures. Official figures showed that the prices charged by China’s manufacturers fell 5.9% in August from a year earlier. It was the largest decline since late 2009. The consumer price index rose 2% from a year earlier but the gain was due largely to soaring food prices, not an improvement in economic activity.The news sent world stocks lower, snapping four days of gains amid fears over a China-led slowdown in global economic growth.