Sri Lanka-born billionaire Raj Rajaratnam's defence team on Wednesday told a US jury that his trading in Goldman Sachs was not based on insider information, but a great deal of research and discussion on the investment bank, especially during the financial crisis.
Raj Rajaratnam, the key accused in the biggest insider trading case in US history, worked hard to learn how the markets was operating and didn't need illegal tips to make money, a former executive of the hedge fund has testified.