HDFC Standard Life Insurance Company rallied 4% to Rs 359 on the National Stock Exchange (NSE) in intra-day trade, extending its Friday's 19% gain on debut, after the foreign institutional investor (FII) bought the stake in the company through open market. HDFC Standard Life Insurance Company soared as much as 27% to Rs 369 on Friday on its debut listing. The share closed at Rs 345, up Rs 55 or 19% from its Initial Public Offer (IPO) allotment. The company issued shares at price of Rs 290 per share.