which digital currency Top Knowledge

Scientists observed semi-Dirac fermion for the first time, and scientists from Pennsylvania State University and Columbia University joined hands to observe a special kind of quasi-particle-semi-Dirac fermion for the first time. Such quasi-particles have mass when moving in one direction, but lose mass when moving in the other direction. The researchers said that in-depth research on these quasi-particles is expected to promote the development of next-generation batteries, sensors and other technologies. Related papers were published in the new issue of Physical Review X.Medical staff: At least seven Palestinians were killed in Israeli air strikes. They were responsible for protecting aid trucks in the south of the Gaza Strip.Most ETFs in the US stock market closed up, with semiconductor ETFs rising by over 2.4%, Broadcom by over 6.6% and NVIDIA by over 3.1%. On Wednesday (December 11th), semiconductor ETFs closed up by 2.45%, Internet stock index ETF rose by over 2%, global aviation ETF, optional consumer ETF, technology industry ETF and global technology stock index ETF rose by 1.81%-1.17%. Semiconductor concept stocks rose almost across the board, Broadcom rose by 6.63%, NVIDIA Double Long ETF rose by more than 6.1%, Laidisi Semiconductor rose by more than 5.9%, NVIDIA rose by 3.14%, while Intel, Cisco, stmicroelectronics ADR and Chipscreen fell by 0.2%-0.65%.

List of A-share share repurchase: 16 companies disclosed the progress of repurchase, and on December 12, a total of 16 companies issued announcements related to share repurchase. Among them, four companies disclosed the stock repurchase plan for the first time, two companies' repurchase plans were approved by the shareholders' meeting, four companies disclosed the implementation progress of stock repurchase, and six companies' repurchase plans have been implemented. Judging from the initial disclosure of the repurchase plan, the amount of a company's stock repurchase plan on that day exceeded 10 million. Nanshan aluminum, Longzhu Science and Technology and Longzhu Science and Technology have the highest repurchase plans, and they plan to repurchase no more than 600 million yuan, 5,895,100 yuan and 1,171,000 yuan respectively. Judging from the repurchase plan passed by the shareholders' meeting, the repurchase plans of two companies exceeded 10 million on that day. Huaan Securities and Tongkun have the highest repurchase amount, with the planned repurchase not exceeding 200 million yuan and 51,966,700 yuan respectively. Judging from the implementation progress of repurchase, Shunluo Electronics, Shengquan Group and Hailiang have the highest repurchase amounts, with 9.009 million yuan, 3.8251 million yuan and 3.5187 million yuan respectively. Judging from the completed repurchase, the repurchase amount of four companies on that day exceeded 10 million. Chengda Pharmaceutical Co., Ltd., Jinshi Resources Co., Ltd. and Yingfangwei Co., Ltd. have completed the highest repurchase amounts, with 57,061,600 yuan, 53,158,000 yuan and 31,405,600 yuan respectively.Market News: Most members of the US House of Representatives support the $895 billion national defense policy bill, and voting continues.Cai Weidong was appointed as the deputy secretary of the Party Committee of Shentong Metro Group. According to the news of Shentong Metro Group, on the afternoon of December 11th, Shentong Metro Group held a leadership adjustment announcement meeting. At the meeting, the Organization Department of the Municipal Party Committee announced that Cai Weidong was appointed as the deputy secretary of the Party Committee of Shanghai Shentong Metro Group Co., Ltd., and Ge Shiping was removed from the post of deputy secretary of the Party Committee of Shanghai Shentong Metro Group Co., Ltd.

GF Securities maintained the "Buy" rating of Giant Bio with a reasonable value of HK$ 55.72.Tesla's share price has reached a record high after three years, and its market value has increased by 556 billion US dollars in six weeks. Tesla's share price has reached a record high for the first time since November 2021. Investors are optimistic that the company's autonomous driving business will be promoted after President-elect Trump takes office. Tesla shares rose 5.9% to close at $424.77 on Wednesday, and analysts have made positive comments on Tesla's prospects in the past week. Since Trump won the election on November 5, Tesla's share price has soared by 69%, which has greatly increased its market value by more than 556 billion US dollars.The performance of deep thinking AI model exceeds the existing weather forecast. A study published in the new issue of Nature reported the latest machine learning model introduced by deep thinking. The model can make reliable probabilistic weather forecast according to current and future weather, and its performance not only exceeds the best traditional medium-range weather forecast, but also can better predict extreme weather, tropical cyclone route and wind energy production.