Billionaire Paul Tudor Jones dismissed about 15 percent of the workforce at his Tudor Investment Corp. after losses and investor withdrawals at the $11 billion hedge fund, according to three people with knowledge of the matter. Tudor earlier Tuesday informed the affected employees, which include positions ranging from money managers to support staff, said the people, who asked not to be identified because the firm is private. Tudor employed 409 people, about half in investing roles, according to a March regulatory filing. “Amid a changing operating environment, we have made strategic adjustments to our firm’s ... (full story)