Ken Griffin's firm is seeking around $40 million over claims a British hedge fund obtained a secret trading strategy from a senior trader at Citadel Securities. Gift Article 10 Remaining As a ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. Billionaire Ken Griffin’s Citadel Securities has moved the testing of the algorithms that power its millions of ...

SEOUL, Jan 27 (Reuters) - South Korea's financial regulator has imposed a fine of 11.88 billion won ($9.66 million) on U.S.-based Citadel Securities, saying it disturbed the local stock market with ...

A trader who works for the hedge fund owned by Illinois’ richest man took the stand for the government in federal court Wednesday but revealed little about how Citadel uses complicated computer ...