Stocks of the United States have risen, with the S&P's 500 showing the highest rally in a two-month period, after China announced it plans to support economic expansion and officials from France and Germany reassured their commitment to do their best to retain Greece in the Euro zone. Shares, which have risen the most among organisations within S&P 500, are mainly technological and industrial companies; the best performers are Boeing Co., Apple Incorporation and Newmont Mining Corporation, appreciating by more than 3.8 per cent. On the other hand, Bank Of America Corporation and Chase and Co. have fallen at least 2.7 per cent.