Palo Alto, Fortinet Stocks Are Diving. Why They're the S&P 500's Worst Performers Today.

Core Viewpoint - China has mandated that domestic companies refrain from using software developed by several U.S. cybersecurity firms [1] Group 1 - The directive affects a range of U.S. cybersecurity companies, indicating a significant shift in China's approach to cybersecurity and foreign technology [1] - This move may impact the operations and market presence of the affected U.S. companies within China [1] - The decision reflects ongoing tensions between the U.S. and China regarding technology and cybersecurity issues [1]