• Nasdaq Sues IEX Over Stock-Exchange Technology Patents

    Accuses upstart exchange of infringing seven patents

    Nasdaq Inc. is suing stock-exchange operator IEX Group Inc. for alleged patent infringement, punching back at an upstart that is trying to challenge larger rivals.

    The lawsuit accuses IEX of infringing seven of Nasdaq’s patents for electronic-trading technology after the startup was founded in 2012, according to a copy of the lawsuit provided by Nasdaq to The Wall Street Journal.

    IEX...