The TAIEX yesterday sank by 680.76 points, or 4.11 percent, to close at 15,902.37 points, the second- largest one-day drop after a fall of 696 points on Jan. 30 last year, amid concern over the rising number of local COVID-19 infections, analysts said. The weighted index, which closed at 16,583.13 points on Tuesday, opened down and lost 300 points in the first 15 minutes of trading, before climbing to 16,550 points at 9:46am, Taiwan Stock Exchange (TWSE) data showed. However, it lost its footing again, plunging 1,400 points to 15,165.27 points at 11:25am. That represented a drop of 9 percent — the largest