Overnight LME base metal shocks weakened, due to poor data in major economies and the Fed did not release to increase QE3 information, the market expectations fall. At the end of the overnight Fed to keep interest rates unchanged, to maintain the monthly purchase of 40 billion bond size, will continue to reverse the operation before the end of the year. In the US election will be held two weeks later, the Fed to maintain the status quo, in line with market expectations. The US economy has continued to grow at a modest rate in recent months, with employment growth slowing in recent months and the unemployment rate remains high. At the same time, despite the improvement, but the US real estate market is still in the doldrums. Yesterday, the economic data of different countries, China's HSBC manufacturing in October PMI hit a three-month high to 49.1, the United States in October Markit manufacturing PMI rose to 51.3. Germany's manufacturing sector fell to 45.7 for six consecutive months, the euro area in October manufacturing PMI initial value fell to 45.3, the euro zone integrated PMI recorded the lowest level of 40 months in the past 40.8, showing that Europe is plunged into a further shrinking state. In the above bad news and the economic situation has not yet improved the weak, is expected today, the Shanghai stock market to maintain a weak trend.