Cantor Exchange Posted on December 3, 2009 by admin Some chatters on Elite Trader. Related PostsFelix Salmons hastily written NYT Op-Ed about the Cantor Exchange and MDEXWhat the Cantor Exchange (HSX) and the Media Derivatives Exchange (MDEX) really said to the US Congress about movie futures (a.k.a. box-office derivatives) – [VIDEO]In light of the upcoming bursting of the Cantor Exchange, Max Keiser have regrets about creating the Hollywood Stock Exchange.