The Wall Street Journal, citing people familiar with the matter, reported that U.S. financial regulators have launched investigations into some companies that announced the adoption of cryptocurrency reserve strategies, focusing on unusual trading that occurred before the announcements. The U.S. Securities and Exchange Commission and the Financial Industry Regulatory Authority have sent letters to some companies, pointing out that the trading volume of the relevant stocks increased significantly and the stock price rose rapidly in the days before the announcement, which may pose a risk of violating the Fair Disclosure Rules. Lawyers say that such letters usually indicate that insider trading investigations may be further deepened. Reports indicate that more than 200 companies have followed the model of Strategy (MSTR.O) this year, raising funds to purchase Bitcoin and other digital assets through the issuance of stocks and bonds. (Wall Street Journal)