Taiwan stocks ended 0.21 percent lower on Tuesday as investors took profit from chip makers, with TSMC shedding 2.2 percent. The main TAIEX index slipped 17.05 points to 8,263.05, after opening up 0.1 percent. Electronics shares retreated 0.4 percent, while banks eased 0.2 percent. These two sectors are the most heavily weighted. The Taiwan dollar climbed by T$0.067 to stand at T$29.904 against the US dollar.