Aluminum fell slightly last Friday. After starting to open higher in 1863, Lun Aluminum competed more intensely, lowering it to 1852.5, hitting a higher upside of 1874, and ending up at 1858, down 6 dollars from last Thursday. Volume was 110682 lots, down 2529 lots from last Thursday. Open interest is 427,290 lots, an increase of 3,402 lots compared to last Thursday; stocks are 533,275 tons, an increase of 75 tons over the previous trading day. News: The US Department of Commerce announced last Friday that the preliminary estimate of gross domestic product (GDP) in the second quarter was 3.4% growth, slightly lower than the 3.8% growth in the previous quarter, which is in line with analysts' expectations. The National Purchasing Managers Association’s July corporate activity index rose to 339.6, which is a higher level since April. The July Chicago Purchasing Managers' Index (PMI) surged to 63.5 from 53.6 the previous month, well above analysts' original estimate of 55.5. The July final consumer confidence index of the University of Michigan rose from 96 in June to 96.5, which is in line with analyst estimates. From the above data, it can be seen that the economic indicators announced by the United States last Friday were basically in line with expectations, and the US economy is still showing a steady development trend, which will continue to play a clear supporting role for the recent aluminum market. Foreign exchange market: The number of initial jobless claims announced by the United States last week rose slightly to 310,000, and the market ignored this. Two hardliner members of the US Congress held a press conference and stated that they will continue to exert pressure on China in order to promote a more substantial appreciation of the renminbi. Otherwise, they will retaliate against China. At present, in view of the outside world or speculative capital, China revalues ​​the renminbi. A large part of this is due to pressure from the United States. Therefore, the press conference will pressure the US dollar, and the technical requirements for non-US currencies to rebound will cause the US dollar to fall across the board. Operational recommendations: lighten up rallies.