Taiwan's stock market rose by 393.92 points on the 25th, a gain of 2.02%, reaching nearly 20,000 points during the trading session before closing at 19,872.73. UMC (2303) saw its gross margin drop below 30%, hitting a 19-quarter low, yet foreign investors boosted their target prices, with estimates reaching 53 TWD. On the same day, leading investors aggressively bought 15,000 shares, making UMC the top net buyer.

In contrast, Hon Hai (2317) had its target price lowered by American firms to 175 TWD, but main investors still managed to buy 12,000 shares, ranking fourth in net buys. According to data, the top five net buyers for the day included UMC (2303) with 15,617 shares, Winbond (2344) in second with 13,807, followed by Shin Kong Financial (2888) with 13,793 shares, Hon Hai (2317) in fourth, and Taishin Financial (2887) in fifth with 6,420 shares.

UMC recently released its Q1 financial report, showing a revenue of 57.859 billion TWD, down 4.2% from the previous quarter but up 5.9% year-on-year. Its gross margin dropped to 26.7%, and net profit after tax was 7.777 billion TWD, with earnings per share (EPS) at 0.62 TWD, marking a 19-quarter low. Despite this, foreign investors remain optimistic and have raised UMC’s target prices.

Amid uncertainties regarding U.S. President Trump’s tariff policies, American firms predict that Apple’s supply chain profits will decline by 12% and 15% in 2025 and 2026, respectively. Consequently, Hon Hai maintained its 'add' rating, revising its target price from 232 TWD down to 175 TWD. Nonetheless, on the 25th, the stock price rose by 1.83%, closing at 139 TWD.