National Stock Exchange’s former Managing Director and Chief Executive Officer Chitra Ramkrishna is under the scanner of the Central Bureau of Investigation (CBI) for allegedly sharing confidential information about the NSE with a ‘yogi who lives in the Himalaya’, sources have told India Today. The CBI has banned Chitra Ramkrishna along with NSE’s former Group Operating Officer Anand Subramaniam and ex-CEO Ravi Narain from travelling outside India.