SEOUL, Jul 30 : South Korean technology giant Samsung Electronics on Thursday reported a record operating profit of 89.5 trillion won (USD 62 billion) for the April-June period, a day after crosstown rival SK Hynix also reported record earnings, as the world's two largest memory chipmakers continue to ride the global artificial intelligence boom.Despite their soaring profits, the companies' shares have fallen sharply this week in South Korea's volatile stock market, where retail investors often drive sharp swings in share prices, as concerns grow over their plans to spend massively on increasing manufacturing capacity and the prospects of intensifying competition...