[THE INVESTOR] Prosecutors on July 13 summoned Kim Jung-ju, founder of the nation’s largest game company Nexon, on suspicions that he gave insider information to a senior prosecutor to help him gain illegal stock gains.The prosecutors said they will question Kim on whether he had leaked information about the stock market debut of Nexon Japan to Jin Kyung-joon, a prosecutor who is also his college friend.Nexon founder Kim Jung-ju (third from left) / The Investor(Chung Hee-jo)Jin had bought 10,000