HDFC Bank’s market capitalisation has surpassed the Rs 15 lakh crore-mark on April 22 for the first time. The private lender’s stock surged 2.25 per cent to touch a new all-time high of Rs 1,970.60 on the NSE, extending its winning streak for the sixth consecutive day. However, it settled at Rs 1,960, with 1.71 per cent gains.