Mumbai: The Indian stock market closed flat on Friday as selling was seen in the auto, PSU bank, financial service, metal, and realty sectors at the end of trading. Sensex slipped 55.47 points, or 0.07 percent, to 79,486.32. On the other hand, Nifty fell 51.15 points, or 0.21 percent, to 24,148.20. Nifty Bank fell 355.30.