Share the QR code < / P > < p > with wechat scanning code to friends and circle of friends < / P > < p > U.S. time on Tuesday, U.S. stocks closed, and the main stock indexes fell sharply across the board. Investors reassessed the risks posed by COVID-19's variant of the, while fed chairman Powell said it would discuss the need to speed up the scale of debt reduction. p> < p > the Dow Jones index closed at 34483.72, down 652.22 points, or 1.86%; The standard & Poor's 500 index closed at 4567.00, down 1.90%; The Nasdaq composite index, dominated by technology stocks, closed at 15537.69, down 1.55% < p > large technology stocks generally fell, and Apple's share price rose against the trend, up more than 3%; The shares of Google, Amazon, Microsoft, meta (Facebook) and Netflix all fell, with meta down more than 4% and Google and Netflix down more than 2% < p > leading chip stocks generally fell, among which NVIDIA fell by more than 2%, and TSMC, Intel, Qualcomm and Broadcom all fell by more than 1% < p > electric vehicle stocks rose or fell, Tesla rose 0.68%, rivian fell 0.01% and Faraday rose 0.49% in the future; Weilai fell 3.29%, Xiaopeng rose 7.09% and ideal rose 2.78% < p > Zhongyu e-commerce stocks generally fell, Alibaba fell 3.10%, JD fell 4.32% and pinduoduo fell 7.59% < p > zhonggai online education stocks rose or fell, tal rose 3.60%, New Oriental rose 2.31%, gaotu fell 3.26%, and Netease Youdao fell 0.50% < p > other popular Chinese stocks generally fell, including boss direct employment fell 7.28%, BiliBili fell 2.31%, Didi fell 2.30%, manbang fell 2.04%, baidu fell 0.30%, Zhihu fell 0.14% and Betta rose 2.21% < p > specifically, the performance of major technology stocks in U.S. stocks is as follows: < / P > < p > the performance of major chip stocks in U.S. stocks is as follows: < / P > < p > the performance of major Chinese concept stocks listed in the United States is as follows: < / P > < p > at a hearing of a committee of the U.S. Senate, Powell said he believes that he can accelerate and reduce the scale of monthly bond purchases. Earlier this month, the Federal Reserve announced that it would reduce its bond purchase by $15 billion a month from November < p > Powell said: "at present, the economy is very strong and inflationary pressure is high, so in my opinion, it is appropriate to consider reducing the scale of asset purchase... It may be completed a few months earlier. I expect we will discuss this issue at the upcoming meeting." < / P > < p > Powell's remarks show that the focus of the Federal Reserve has now shifted to fighting inflation and its negative effects, Rather than fighting any potential damage to COVID-19's economic activities. P>

before the US stock market opened on Tuesday, Stefan Basail, chief executive of Moderna, the US vaccine manufacturer, told the media that he expected the effect of the existing vaccine to COVID-19's new variety would be worse than that of p>

. He said that the effectiveness of the current vaccine against new variants may be "substantially reduced". Bansell told the media that it may take several months to develop and deploy a vaccine specifically for the new crown variant strain Omicron

us time on Tuesday, 10 year Treasury yields fell below the 1.45% mark because investors worried that COVID-19's new variants would lead to a slowdown in the US economy. The yield on the 10-year Treasury note fell 9 basis points to 1.44%. The benchmark yield was as high as 1.69% last week and fell below 1.5% last Friday < p > on the same day, the US oil price also fell, and the US West Texas Intermediate oil (WTI) futures price fell 5.4% to close at US $66.18 per barrel < p > (Liu Chun)