MUMBAI: Benchmark Sensex closed higher by 94 points while the broader Nifty retreated from record high levels in a volatile trading on Tuesday as investors turned cautious amid high valuation concerns. Rising for an eighth day in a row, the 30-share BSE Sensex rose by 94.05 points or 0.14 per cent to settle at 67,221.13. During the day, it jumped 412.02 points or 0.61 per cent to 67,539.10. The broader Nifty, however, pared all its gains and ended marginally lower by 3.15 points or 0.02 per cent...