Mumbai, Aug 5: Benchmark BSE Sensex closed higher by 152 points in a volatile session on Wednesday after the Reserve Bank of India kept its key policy rates unchanged for the fourth consecutive time. The six-member Monetary Policy Committee, headed by Governor Sanjay Malhotra, unanimously voted to keep the policy repo rate unchanged at 5.25 per cent and retained its “neutral” policy stance. Broader markets also advanced as the BSE SmallCap Select index climbed 0.73 per cent and MidCap Select index went up by 0.45 per cent. In Asian markets, South Korea’s KOSPI jumped 3.76 per cent and Japan’s Nikkei 225 index climbed 3.66 per cent. In the previous session, the Sensex declined 210.08 points, or 0.27 per cent, to settle at 78,428.95.