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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.Six members of the ruling party of South Korean President Yin Xiyue supported the impeachment of the president.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.

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.The probability that the Fed will cut interest rates by 25 basis points in December is 98.6%. According to CME's "Fed Watch", the probability that the Fed will keep the current interest rate unchanged by December is 1.4%, and the cumulative probability of cutting interest rates by 25 basis points is 98.6%. The probability of keeping the current interest rate unchanged by January next year is 1.1%, the probability of cutting interest rates by 25 basis points is 79.9%, and the probability of cutting interest rates by 50 basis points is 19%.The personal pension system will be expanded soon, and the third pillar of old-age security will be built in an all-round way. Recently, it was reported that the personal pension system will be implemented nationwide on the basis of pilot projects in 36 places. "It should be implemented nationwide soon. In fact, we have been making systematic preparations, and we are now well prepared." The staff of a state-owned bank in a non-pilot city told reporters. Industry researchers also told reporters that when the individual pension system was piloted, relevant supporting policies were made at the end of that year. "If it is fully rolled out according to the previous rhythm, there should be a saying before the end of this year." (Securities Times)

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%.The probability that the Fed will cut interest rates by 25 basis points in December is 98.6%. According to CME's "Fed Watch", the probability that the Fed will keep the current interest rate unchanged by December is 1.4%, and the cumulative probability of cutting interest rates by 25 basis points is 98.6%. The probability of keeping the current interest rate unchanged by January next year is 1.1%, the probability of cutting interest rates by 25 basis points is 79.9%, and the probability of cutting interest rates by 50 basis points is 19%.