In the special Diwali Muhurat trading session held today, from 4.30 p.m. to 6 p.m., the Sensex at the Bombay Stock Exchange gained 34 points, or 0.2 percent to close at 17,289, amid positive Asian and European markets. The Nifty at the National Stock Exchange rose 10 points, or 0.2 percent, to 5,202.