Nasdaq Market-Makers Antitrust Litigation was a class-action lawsuit initiated in 1996 alleging collusion amongst Wall Street traders. The class action alleged that market makers on the Nasdaq set and maintained wide spreads pursuant to an industry-wide conspiracy. Litigation took nearly four years and was eventually settled for $1.027 billion, which was the largest antitrust recovery up to that point.
See also Electronic communication network List of class action lawsuits
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