April 11 (UPI) -- South Korea's consultancy CXO Institute said Wednesday that among the country's business tycoons, HYBE Chairman Bang Si-hyuk recorded the largest increase in stock value in the first quarter of this year. The 52-year-old self-made businessman, who debuted K-pop sensation BTS , saw his stake in HYBE jump by $348 million during the first three months of this year to reach $2.09 billion. As a result, Bang ranked No. 5 in the nation's stock-rich list, following Samsung Electronics