 The online retail giant Amazon has reached a valuation in excess of $2 trillion for the first time. It's only the fifth company to do so. All five are U.S. tech entities. Amazon's stock is up by more than a quarter since the start of this year. Chinese state media say the Politburo has decided to convene a long-delayed key Communist Party meeting next month. The plenary meeting of the Central Committee will take place from July to November.