Bajaj Auto reported strong results for the fourth quarter of fiscal year 2010 that exceeded estimates. Net sales grew 80.5% year-over-year to Rs3,399 crore, driven by an 83.8% increase in volume. Operating profit margin expanded substantially to 22.9% compared to 15.2% in the prior year quarter. Net profit for the quarter was Rs529 crore, up 306% year-over-year and above estimates. For fiscal year 2011, management expects robust volume growth and maintains guidance of 20% operating profit margin despite rising raw material costs.