The TAIEX had its biggest tumble in six weeks after a US report showed factory production in the world's largest economy unexpectedly dropped in August. Taiwan Semiconductor Manufacturing Co (TSMC, 台積電) led the decline.
The TAIEX fell 151.21, or 3.3 percent, to 4,482.65, its biggest fall since Aug. 5, with TSMC falling 6.9 percent to NT$45.60. More than six stocks fell for every one that rose within the index. The total value of trade was NT$53 billion (US$1.53 billion).
"Consumer demand may be rising, but industrial demand isn't," said Douglas Chang, who helps manage about NT$1 billion (US$30 million) in stocks at Union Securities Investment Trust Corp (聯邦投信).
Q-Run Technology Corp (華生電子) rose NT$0.60, or 1.7 percent, to NT$36.50 on a local Chinese-language newspaper report that the unit of Hon Hai Precision Industry Co (鴻海精密) received an order to make flat-panel iMac computers for Apple Computer Inc, with shipments starting next month. Q-Run denied the report.
Hua Nan Financial Holding Co (華南金控) fell NT$1.10, or 6 percent, to NT$17.20. Hua Nan Commercial Bank (華南銀行), a unit of the holding company, and Taiwan Cooperative Bank (合作金庫) received approval from China to set up representative offices in the mainland.
Nanya Technology Corp (南亞科技), the island's largest maker of high-speed memory chips, fell NT$1.90, or 6.8 percent, to NT$26.20. The price of a high-speed double-data-rate memory chip dropped 1.8 percent to US$3.25 on Tuesday, its biggest fall in three weeks, according to DramExchange.com, a Taiwan-based computer chip clearinghouse.
Novatek Microelectronics Ltd (聯詠科技) fell NT$5, or 6.7 percent, to NT$70. Flat-panel-display makers returned chips used to run displays to two unidentified chipmakers because the chips' efficiency didn't meet requirements, a Chinese-language newspaper reported. Novatek said its chips' efficiency meet requirements and shipments are normal.
HannStar Display Corp (瀚宇彩晶) fell NT$0.95, or 6.8 percent, to NT$13.05. Fubon Securities Co (富邦證券), which is helping arrange the sale of 500 million HannStar shares to fund a new plant, cut the sale price to as low as NT$12 a share, more than a third lower than the planned price.
Elite Material Co (台光電科技) fell NT$0.60, or 5.9 percent, to NT$9.65. The maker of parts for printed-circuit boards dumped its pretax profit forecast for a NT$71.4 million loss, citing falling prices and shipments.
Qualitek Electronics Co (永兆精密) fell NT$0.30 cents, or 3.4 percent, to NT$8.50. The printed-circuit-board maker more than doubled its pretax loss forecast to NT$252.6 million, citing falling prices and orders.
CTB Financial Holding Co (交銀金控) fell NT$0.60, or 3.7 percent, to NT$15.50 after Chiao Tung Bank (交通銀行) sold NT$17.8 billion of bad loans to Deutsche Bank AG and a venture between Merrill Lynch & Co and Salomon Smith Barney Inc.
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