NSE, the National Stock Exchange of India, was set up in 1992 and began trading in 1994 as the first fully electronic exchange in the country. It is now the largest exchange in India by volume and one of the largest derivatives exchanges in the world by contracts traded. NSE publishes Nifty 50 and the wider Nifty family of indices, and its F&O segment on Nifty, Bank Nifty and individual stocks accounts for most of India's derivatives activity. Trading hours for equities are 9:15 AM to 3:30 PM, with a pre-open session from 9:00 AM. Most companies are listed on both NSE and BSE, and prices stay in line across the two. NSE also runs currency derivatives, the segment where Indian residents can legally trade USD/INR and other INR pairs. SEBI regulates it, and NSE Clearing guarantees settlement of trades.