The new caller was a woman named Danielle Chiesi. Her conversations with Rajaratnam on his cell phone titillated, touching on everything from sex to sport. Trading corporate news, Chiesi once said, was “like an orgasm.” It soon became clear to the agents and Michaelson that she inhabited a world of powerful men whom she played off one another to make her living. Her galaxy of sources was so impressive that Rajaratnam could not ignore her.

