Sensex falls ahead of GDP, IT hit

The Sensex falls 0.38 percent, while the Nifty declines 0.57 percent. Traders are cautious ahead of April-June economic growth data due around 11 a.m. and Federal Reserve Governor Ben Bernanke's speech in Jackson Hole at around 7.30 p.m.

Software services exporters fall on worries intensified competition and a weaker global outlook will hurt the pricing power in the sector, dealers say.

Tata Consultancy Services falls 1.4 percent, while Infosys loses 0.6 percent.