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TOKYO — <\/span>South Korea\u2019s Kospi stock index dropped more than 8% on Wednesday as doubts over massive investments in artificial intelligence once again led investors to dump shares. <\/p>\n The latest rout was led by a plunge in shares in chipmaker SK Hynix after its operating profit in the last quarter fell short of analysts\u2019 forecasts even though it soared sixfold to a record 60.5 trillion won ($41.2 billion). <\/p>\n By midday in Seoul, the Kospi was down 8.2% at 5,531.56. The benchmark only recently had topped 9,000 before toppling back to its lowest level since early April. <\/p>\n SK Hynix sank 12.6% while shares in Samsung Electronics dropped 8%.<\/p>\n Other Asian markets also mostly declined. <\/p>\n In Tokyo, the Nikkei 225 lost 1.8% to 61,038.63, giving up early gains. <\/p>\n Japanese stocks were mixed in their reaction to a major earthquake that rattled the southern Kyushu region<\/a> a day earlier. A previous earthquake in the region caused severe damage and disruptions for automakers and other manufacturers. <\/p>\n Shares in Nippon Paper, owner of a mill in the disaster zone that was severely damaged by Tuesday\u2019s quake, fell 1%<\/p>\n Taiwan\u2019s Taiex shed 3.6%. <\/p>\n The Shanghai Composite index fell 0.5% to 3,793.11. <\/p>\n Hong Kong’s Hang Seng countered the regional trend, gaining 1.7% to 25,738.42 and in Australia the S&P\/ASX 200 added 1% to 9,036.90. <\/p>\n Oil prices that had eased<\/a> from the two-month high<\/a> that they hit last week rebounded.<\/p>\n Brent crude, the international standard, jumped 4.2% to $87.58 a barrel. <\/p>\n Benchmark U.S. crude also gained 4.2%, to $82.58. <\/p>\n On Tuesday, shares were mixed on Wall Street. <\/p>\n The S&P 500 added 0.2% and the Dow Jones Industrial Average jumped 1%.<\/p>\n The Nasdaq composite slipped 0.2%.<\/p>\n The majority of U.S. stocks rose after more companies delivered stronger profits for the spring than analysts expected. Coca-Cola climbed 5% after its revenue rose 7%. <\/p>\n Expectations for stellar earnings reports are weighing particularly heavily on stocks of chipmakers and other companies that have been huge winners from the boom in artificial-intelligence<\/a> technology. <\/p>\n Micron Technology\u2019s stock came into the day having more than tripled for the year following gangbuster growth, but its shares sank 8.9%. <\/p>\n Others also helping to keep the market in check were Advanced Micro Devices, down 8.1%, and Applied Materials, down 7.8%. <\/p>\n In currency trading in Asia, the U.S. dollar slipped 163.57 Japanese yen from 163.81 yen. The euro cost $1.1399, up from $1.1391. <\/p>\n ___<\/p>\n AP Business Writer Stan Choe contributed.<\/p>\n<\/div>\n