I'm shocked! HFT triggers 'Casablanca' flashback By: CNBC.com News April 04, 2014 at 10:21 AM EDT The high-frequency trading debate is giving Ron Insana "Casablanca" flashbacks: "I'm shocked, SHOCKED to find that gambling is going on in here!" Read More >> Related Stocks: Sentinelone Inc Cl A Twitter, Inc.