Monday will see two heavyweight firms - Bharti Airtel and Housing Development Finance Corp (HDFC) declaring their July-September quarter results. Analysts expect Bharti Airtel’s consolidated net profit to fall 20-30 per cent year-on-year. However, the company is expected to post higher data growth on the launch of high-speed 3G/4G data services in some circles. HDFC is expected to announce steady growth numbers as usual.