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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.Japanese enterprise survey: Enterprises believe that Trump's next presidential term will have a negative impact on the business environment, and 60% of Japanese enterprises expect that the trading range of USD/JPY will be between 140 and 150 by 2025. Half of Japanese companies expect higher profits in the next fiscal year.Trump's nominated director of NASA said that his future mission of cooperating with SpaceX would be put on hold. On December 11th, local time, jared Isakman, the director of NASA nominated by US President-elect Trump, said that his future private astronaut mission planned to cooperate with SpaceX of elon musk might be put on hold. Isaac Mann said that the future of the Polaris Project is still a "question mark".

Guotai Junan: A shares are expected to go out of the New Year's market. Recently, Guotai Junan's 2025 strategy meeting will be held in Shenzhen. The conference made an in-depth discussion and comprehensive outlook on the hot topics of market concern and the investment strategy in 2025. Fang Yi, chief strategist of Guotai Junan, said in an interview that the bottom of the A-share market has emerged, which is optimistic about the prospects of China stock market. The key driving force for the market to start comes from the decline of risk-free interest rate and the boost of risk preference. After a long period of continuous adjustment, the pessimistic expectation and microstructure of A-shares are fully clarified, and the positive signal of decision-makers to steady economic growth and support the capital market is an important cornerstone for the upward revision of long-term expectations and the elevation of the bottom of the stock market. Looking forward to the A-share market in 2025, Fang Yi said that there is still room for the optimistic policy expectation at the end of the year and the beginning of the year, and A-shares are expected to go out of the New Year's market. However, in the case of rising geopolitical conflict risks, the stock index may face a staged headwind. However, as the market stabilizes and revises the economic and policy expectations, the stock index is expected to strengthen again in the second half of 2025. (shanghai securities news)The position ETF--iShares Silver Trust, the world's largest silver ETF, decreased by 179.98 tons compared with the previous day, and the current position is 14,414.25 tons.Swiss national bank: ready to intervene in the foreign exchange market when necessary.

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.Goldman Sachs upgraded Societe Generale to neutral. Chris Hallam, an analyst at Goldman Sachs, had a previous rating of sell. The target price is 29.25 euros, which is 9% higher.