The Federal Trade Commission (FTC) is suing to block Nvidia's $40 billion acquisition of Arm Ltd., citing concerns that the combined firm would stifle innovation and reduce competition in the semiconductor chip market. Arm's technology is used by many companies, including Nvidia's competitors, to develop their own chips. The FTC alleges that Nvidia would have the means and incentive to undermine its competitors and reduce innovation. The acquisition would give Nvidia control over the computing technology and designs that rival firms rely on to develop their own competing chips.