The BSE benchmark Sensex was trading 35 points down at 17,598 points, a shortwhile ago. It declined by nearly 21 points in early trade ahead of July inflation data amid profit-booking by speculators. The 30-share barometer, which gained 76 points yesterday, fell by nearly 21 points in early trade with stocks of realty, capital goods and healthcare sectors falling on profit-booking.Similarly, the wide-based National Stock Exchange index Nifty was also trading 9 points down at 5,339 points, a shortwhile ago.