As record stock market rally continues, the value of shares directly owned by next-generation business leaders at 20 major corporate houses has soared over 18% to Rs 17,000 crore so far this year. This includes value of shares owned by the children of top executives and promoters of the listed blue-chips such as Infosys, Cipla, Sun Pharma and the Reliance groups, while excluding the family holdings and equity owned through other entities such as trusts.