Alibaba founder and executive chairman Jack Ma is this year's biggest financial gainer as the billionaire entrepreneur's fortune has swelled by a whopping USD 18.5 billion this year to USD 29.2 billion, a report says. According to private wealth consultancy, Wealth-X, the former English teacher-turned billionaire entrepreneur is the biggest gainer of this year as his fortune increased 173 per cent, largely due to Alibaba's blockbuster IPO in September and the subsequent strong performance of the company's stock.