Stock markets closed lower for the second straight day on Friday amid relentless foreign fund outflows and losses in blue-chip stocks Reliance Industries, ICICI Bank and State Bank of India.Benchmark BSE Sensex declined by 55.47 points or 0.07 per cent to settle at 79,486.32.During the day, it tanked 424.42 points or 0.53 per cent to 79,117.37.