--- title: "U.S. stock market midday update: AIFU plummets 13.45%, CFO resigns amid disclosure concerns" type: "News" locale: "en" url: "https://longbridge.com/en/news/296254136.md" description: "AIFU fell 13.45%; Marsh & McLennan rose 1.60%, with a transaction volume of USD 126 million; Accelerant - CL rose 0.08%, with a transaction volume of USD 9.529 million; Arthur J. Gallagher rose 1.45%, with a transaction volume of USD 8.993 million; Aon Group fell 0.07%, with a market value of USD 73.6 billion" datetime: "2026-08-18T16:43:39.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/296254136.md) - [en](https://longbridge.com/en/news/296254136.md) - [zh-HK](https://longbridge.com/zh-HK/news/296254136.md) generator: "portal-rs" --- # U.S. stock market midday update: AIFU plummets 13.45%, CFO resigns amid disclosure concerns **U.S. Stock Market Midday Update** AIFU fell 13.45%. Based on recent key news: 1. On August 17, AIFU announced the resignation of CFO Huang Huaguang and the immediate appointment of Chang Shanyu as the new CFO. This news raised market concerns about the stability of the company's management, leading to a significant drop in stock price. 2. On August 17, the Securities and Exchange Commission released documents related to AIFU's information disclosure. Although specific details were not elaborated, such documents typically raise investor concerns about the company's compliance and financial transparency, further exacerbating stock price volatility. The market is sensitive to management changes. **Top Stocks by Industry Trading Volume** Marsh & McLennan rose 1.60%. Based on recent key news: 1. On August 18, Marsh & McLennan announced a distribution of 1.74 Brazilian Reais per unit for the third quarter of 2026. This news may have boosted investor confidence, driving the stock price up. Source: Public Technologies 2. On August 16, analysts maintained a hold rating on Marsh & McLennan, with no significant rating changes. Source: Simply Wall St 3. No other significant news recently. The overall industry performance is stable, with noticeable capital inflow. Accelerant - CL rose 0.08%. Based on recent key news: 1. On August 14, RBC Capital analyst Rowland Mayor downgraded Accelerant Holdings Class A to a hold rating and set a target price of $20.25. This move may lead to a decline in investor confidence and stock price volatility. 2. On August 18, insiders may have financial advantages not available to ordinary shareholders, advising shareholders to contact the company to understand their rights and options. 3. On August 18, Halper Sadeh LLC, representing shareholders, may seek increased consideration, additional disclosures and information, or other remedies and benefits, which may affect market confidence in the company's governance. The financial industry has been volatile recently, and investors need to pay attention. Arthur Gallagher rose 1.45%. Based on recent key news: 1. On August 17, Argus Research maintained a buy rating on Arthur Gallagher, enhancing market confidence and driving the stock price up. Source: Benzinga 2. On August 17, MarketBeat noted that although Arthur Gallagher was rated as a moderate buy, top analysts are more optimistic about five other stocks, which may limit its further upside potential. Source: MarketBeat Market capital inflow, trading is active. **Top Stocks by Industry Market Capitalization** Aon Group fell 0.07%. Based on recent key news: 1. On August 18, Aon Group announced the launch of Sidecar X, which increases dedicated capacity and analytics-driven underwriting aimed at optimizing risk management for large mergers and acquisitions. This innovation may enhance market confidence in its business capabilities; however, the stock price still experienced a slight decline. 2. On August 18, Aon Group appointed Nadin Virani as interim Chief Financial Officer, and the leadership change may affect investor sentiment, leading to stock price fluctuations. 3. On August 17, Aon Group reaffirmed its full-year financial guidance for 2026, demonstrating confidence in future performance, but failed to significantly boost the stock price. The industry is experiencing frequent innovations, and market sentiment is volatile ### Related Stocks - [AIFU.US](https://longbridge.com/en/quote/AIFU.US.md) - [MRSH.US](https://longbridge.com/en/quote/MRSH.US.md) - [ARX.US](https://longbridge.com/en/quote/ARX.US.md) - [AJG.US](https://longbridge.com/en/quote/AJG.US.md) - [AON.US](https://longbridge.com/en/quote/AON.US.md) ## Related News & Research - [Aifu says Expansion Group stake rises to 99.43% voting power after planned Class B share subscription](https://longbridge.com/en/news/298501417.md) - [Wall St Week Ahead-Investors brace for possible rate hike at uncertain Fed meeting](https://longbridge.com/en/news/298831878.md) - [Prediction: This high-yield Dow dividend stock will become a dividend king before the end of the year](https://longbridge.com/en/news/298812498.md) - [Peter Schiff says Trump is only 'numbing the pain' of America's $40T debt problem — protect your retirement before the crisis hits](https://longbridge.com/en/news/298833014.md) - [Does the Fed really control the market?](https://longbridge.com/en/news/298776881.md) --- > **Disclaimer: This article is for reference only and does not constitute any investment advice.**