In a move that could significantly alter the trajectory of the U.S. technology sector, the Biden administration on Thursday unveiled a comprehensive set of antitrust regulations targeting the largest tech companies, including Alphabet, Amazon, Apple, and Meta. The policy package, announced by the Federal Trade Commission (FTC) in coordination with the Department of Justice (DOJ), aims to limit anti-competitive practices such as preferential platform treatment, data monopolization, and acquisitions of emerging competitors. The new rules, which require congressional review but are expected to pass via executive authority if necessary, would restrict how tech giants use consumer data, prevent them from favoring their own products on platforms they operate, and increase transparency in algorithmic decision-making. Additionally, the DOJ will now have broader authority to block mergers deemed to stifle innovation or reduce consumer choice. In response to the announcement, U.S. stock markets saw immediate volatility. The Nasdaq Composite fell 2.1% in intraday trading, led by a sharp decline in shares of Alphabet (-3.8%), Amazon (-3.5%), and Meta (-4.2%). Investors appear concerned that the new regulatory environment could hinder growth, increase compliance costs, and expose firms to heightened legal scrutiny. “This is a watershed moment for antitrust enforcement in the digital age,” said FTC Chair Lina Khan during a press briefing. “For too long, a handful of companies have wielded outsized influence over the market and our daily lives. These rules are designed to restore competition and protect consumers.” Corporate leaders pushed back immediately. In a statement, an Amazon spokesperson said, “These regulations threaten to undermine the innovation and customer-centric focus that have defined America’s tech leadership.” Apple and Meta representatives echoed similar concerns, warning that the rules could stifle innovation and complicate global operations. Analysts say the regulatory change could have lasting implications for earnings forecasts and investment strategies. “Tech companies have been priced for perfection, assuming continued dominance,” said Morgan Stanley analyst Rachel Liu. “These new rules introduce a layer of regulatory uncertainty that could compress valuations and slow growth metrics over the next several quarters.” The legislation is set to be phased in over the next 12 to 18 months, with the FTC pledging regular updates and stakeholder consultations. Meanwhile, investors are bracing for further volatility as markets digest the broader implications of a more aggressive antitrust stance from Washington.