While speaking at the Milken Institute Global Conference many of Wall Street’s top CEOs said their biggest worry is a cyber attack that could bring down the financial system; according to Business Insider JPMorgan Chase CEO Jamie Dimon said in a recent shareholder letter that cybersecurity, “may very well be the biggest threat to the US financial system.”; that feeling was also echoed by David Hunt, CEO of Prudential Global Investment Management, “If I were looking for the thing that worries me the most, it would be an actual attack on the infrastructure of the financial markets.”; spending on cybersecurity has increased in recent years with large scale attacks happening at credit agencies and retailers. Source.