Thomson, Reuters and Bloomberg have been competing to sell data terminals to large banks, brokerages and hedge funds.

FORBES: Magazine Article

The letter seeks data going back to 2008 as the bank examines whether the seller of ubiquitous trading-data terminals was in breach of contract, the person said.

WSJ: JPMorgan asks Bloomberg for privacy breach data

Since the New York company was founded by New York City Mayor Michael Bloomberg in 1982, its data terminals have seized a growing share of the lucrative market for financial information.

WSJ: J.P. Morgan Asks Bloomberg for Data on What Information Reporters Had Access to