Benchmark stock indices Sensex and Nifty climbed for a third day in a row, led by continuous foreign inflows and optimistic US market trends following the deal on the US debt ceiling. Nifty gained 100 points or 0.5%, almost reaching 18,600 points, while Sensex rose by 345 points to settle at 62,846.38. Only IT and oil and gas sectors underperformed while Bank Nifty remained bullish. Analysts expect Nifty to witness small profit booking due to a bearish harmonic deep crab pattern that formed on hourly charts, but the market breadth remains bullish.