Summary of Pre Market News in the US Stock Exchange: BlackRock Downgrades US Stock Rating, JPMorgan Chase Q3 Revenue Falls Below Expectations BlockBeats News: On October 13th, a list of important news in the pre-market of the US stock market on Tuesday is as follows: 1. Changxin Storage recently disclosed that it has made key progress in a memory chip architecture promoted by Samsung Electronics and SK Hynix; 2. Morgan Stanley's latest report points out that Samsung and SK Hynix currently have forward P/E ratios of only about 3 to 4 times, which may seem cheap but may hide valuation traps at the top of the cycle. Da Mo believes that the stronger the fundamentals of the storage industry, the easier it is to underestimate the risk at the top of the cycle, and high prosperity may not necessarily translate into sustained excess returns; 3. JPMorgan Chase released its third quarter financial report, with adjusted revenue of $50.91 billion and market expectations of $51.37 billion. The third quarter earnings per share were $5.57, with FICC business sales and trading revenue of $5.37 billion and an expected $6 billion; 4. Goldman Sachs' (GS. N) third quarter stock sales and trading revenue was $6.44 billion, with an expected $5.09 billion. Fixed income, currency, and commodity sales and trading revenue for the third quarter was $3.47 billion, with an expected revenue of $3.72 billion; 5. Citigroup's Q3 revenue was $23.85 billion, with a market expectation of $23.72 billion. The sales and trading revenue of fixed income, currency, and commodities in the third quarter was $4.39 billion, with an expected revenue of $4.26 billion. The sales and trading revenue of stocks in the third quarter was 1.73 billion US dollars, with an expected revenue of 1.78 billion US dollars; 6. BlackRock's investment research institute adjusted the US asset allocation, raised the short-term US treasury bond debt rating to over allocation, and raised the long-term US debt rating from under allocation to neutral, ending the position of under allocation of US debt in the past six years. At the same time, the agency downgraded the US stock rating from over allocation to neutral; 7. Yesterday, the net outflow of the US Bitcoin spot ETF was $65.4 million, and the net outflow of the Ethereum spot ETF was $85.4 million.