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Equity benchmark indices Sensex and Nifty hit their fresh record peaks in early trade on Thursday amid firm trend in the US markets and foreign fund inflows. The 30-share BSE Sensex climbed 159.18 points to reach an all-time peak of 74,245.17 in early trade. The Nifty went up 49.6 points to 22,523.65. However, later the markets turned volatile and both the benchmark indices were trading between highs and lows.