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Hong Kong stock Jingtai Holdings plunged nearly 15%, and the company's 1.464 million restricted shares are expected to circulate freely from today.The turnover of Shanghai and Shenzhen stock markets exceeded 500 billion.Guosheng Securities: AEC heavy-duty computing industry chain has entered the era of Lian Heng. Guosheng Securities Research Report pointed out that AEC(Active Electrical Cable) is an active cable interconnection scheme, which is mainly used in short-distance high-speed data transmission scenarios in data centers. 1)AEC is expected to become the first step for optical module manufacturers to penetrate downwards. Optical modules need to master photoelectric conversion and high-speed data communication, and DAC/AEC/AOC products have relatively mature technical requirements compared with single-mode/multimode optical module products with longer transmission distance. 2) Copper interconnection is widely used by large CSP not only in NVIDIA. NVIDIA used a large number of high-density copper interconnects in B series products, which made the industry re-recognize the reliability and price advantage of copper interconnects in short-distance scenes. 3) In the era of Lian Heng, domestic manufacturers still have obvious advantages. Chip manufacturers, represented by NVIDIA, have been hoping to conduct a comprehensive industry consolidation and provide customers with a complete set of solutions. What CSP manufacturers want more is the decoupling of the industrial chain, and every link such as GPU, copper connection, optical module and switch can find corresponding suppliers. The heavy volume of AEC and the rise of CSP manufacturer's independent scheme indicate that the computing power industry chain has entered the era of Lian Heng, and we are firmly optimistic about the domestic related computing power industry chain.

Cantor Fitzgerald, the nominee of Trump Secretary of Commerce, was fined by the SEC, and the US Securities and Exchange Commission (SEC) sued Cantor Fitzgerald, a financial services company, for allegedly violating the regulatory disclosure regulations related to the Special Purpose Acquisition Company (SPAC) before raising funds. Cantor agreed to settle the SEC's allegations with a civil fine of $6.75 million, and agreed not to violate the relevant laws and regulations again, but the company did not admit or deny the relevant allegations. It is worth noting that Howard Lutnick, Chairman and CEO of Cantor, was recently nominated by US President-elect Trump as the Secretary of Commerce, and Lutnick is also the co-chairman of Trump's transition team.List of stock repurchases of Hong Kong stocks: 43 stocks were repurchased by the company. On December 12, a total of 43 Hong Kong stocks were repurchased by the company, and the repurchase amount of 8 stocks exceeded HK$ 10 million. Among them, Tencent Holdings, AIA and Samsonite have the largest repurchase amounts, with the company repurchasing HK$ 704 million, HK$ 61,711,300 and HK$ 34,247,500 respectively. As of December 12, 274 Hong Kong stocks have been repurchased by the company this year, and the cumulative repurchase amount of 62 stocks during the year exceeded HK$ 100 million. Among them, Tencent Holdings, HSBC Holdings and AIA have the largest cumulative repurchase amount during the year, with the company repurchasing HK$ 104.602 billion, HK$ 40.706 billion and HK$ 31.059 billion respectively.Shangpin home delivery and Shulan signed a strategic cooperation agreement. According to Shangpin home delivery, on December 11th, Shangpin home delivery and Shulan formally signed a strategic cooperation agreement at Changshun Group headquarters. The two sides will break through the customized track, explore the path of "customization+software" integration and co-construction, jointly explore market channels, and provide consumers with more convenient, personalized and professional home solutions through integrated and integrated ecological scenarios.

It is reported that the Trump consultant is seeking to reduce or cancel the banking regulator. It is reported that the Trump transition team has begun to explore ways to significantly reduce, merge or even cancel the banking regulator. According to people familiar with the matter, Trump's advisers and potential candidates who may be nominated to lead the banking regulator discussed plans to merge or reorganize major banking regulators, including the Federal Deposit Insurance Corporation, the Office of the Comptroller of the Currency and the Federal Reserve.The net outflow of the main market exceeded 10 billion.The CSI convertible bond index opened lower by 0.03%. Lide convertible bonds rose by more than 7%, and Weipai convertible bonds rose by more than 4%; Z-mode convertible bonds fell by nearly 3%, while Fuxin convertible bonds and Yinxin convertible bonds fell by nearly 2%.