Across the semiconductor markets of Asia on Wednesday, stocks fell sharply in a wave that had begun the night before in the United States — not because the companies had stumbled, but because the tide of investor sentiment had turned against the entire sector. SK Hynix, which had just posted record profits, lost more than ten percent of its value in a single session, a reminder that markets sometimes move by their own logic, indifferent to the underlying health of the businesses they price. From Seoul to Tokyo to Taipei to Hong Kong, the rout was broad and mechanical, raising the oldest questi