Taiwan stock sell-off puts CMC and Huang Hsiang trades under the spotlight

A sharp correction in global technology shares has pushed Taiwan equities into a more volatile stretch, and two listed companies known for actively trading stocks have drawn renewed market attention. CMC Magnetics Corp. said it sold 175 lots of Taiwan Semiconductor Manufacturing Co. shares between July 21 and July 28, 2026, at an average price of NT$2,327.30, booking a loss of NT$7.82 million. Over the same period, it redeployed capital into Nanya Technology and Accton Technology, spending about NT$345 million for 880 lots of Nanya at an average NT$392.59 per share, and about NT$310 million for 135 lots of Accton at an average NT$2,298.08. The report said CMC described the trades as an investment portfolio adjustment. It also noted that, by the time of publication, TSMC was at NT$2,215, Nanya at NT$353.5, and Accton at NT$1,880. The article added that analysts viewed CMC’s trading style as short-term rolling arbitrage rather than a one-off directional bet, pointing out that the company had previously booked a NT$5.09 million gain from another TSMC disposal earlier in July and a NT$41.71 million gain from TSMC in January. Huang Hsiang Construction, meanwhile, bought 432 lots of Yageo on July 1 at an average NT$1,186.57 per share, investing NT$513 million. The purchase came near Yageo’s historic high zone, with the stock hitting an intraday peak of NT$1,220 that day. After Yageo fell to the daily limit-down price of NT$507 on July 29, the position would imply a paper loss approaching NT$300 million if no stop-loss had been taken.