The FBI files spell it out: An analyst at Citadel, the hedge fund with $23bn in capital invested globally, told agents he made millions of dollars trading on information from a company insider.
'Suicide letters' claimed that he planned to kill himself by throwing himself off a high-speed ferry boat.
The FBI believes ETrade observed cybersecurity activity related to this summer's JPMorgan Chase data breach, a source tells CNBC.
A former mortgage broker from Brooklyn admitted on Friday to being the glue that held together an insider trading ring that involved the passing of stock tips on Post-it notes and napkins in meetings at restaurants in Midtown Manhattan and at Grand Central Terminal.
Hackers who stole gigabytes of data from JPMorgan Chase may have been trying to send a message that U.S. financial institutions can be disrupted, the former director of the National Security Agency said.
Russian hackers attacked the U.S. financial system in mid-August, infiltrating and stealing data from JPMorgan Chase and at least one other bank, an incident the FBI is investigating as a possible retaliation for government-sponsored sanctions, according to two people familiar with the probe.
Rengan Rajaratnam, the brother of Galleon Group co-founder Raj Rajaratnam, became the first of at least 88 people charged in a federal crackdown on insider trading to escape conviction.
Secrets from the FBI.
The US government is preparing to auction off more than 29,000 bitcoins seized from the Silk Road website when its alleged chief Ross Ulbricht was arrested, in a move that could net it over $17m.
Bank of America and the New York Stock Exchange were among dozens of exchanges, brokerages and traders sued over high-frequency trading by the city of Providence, Rhode Island, over claims they rigged securities markets to divert billions of dollars from buyers and sellers of shares.