Taiwan stocks fell for a second day on Friday to a three-week closing low, joining other Asian bourses in declines, weighed down by financial shares. The main TAIEX index ended down 0.3 percent at 8,209.78 points, its lowest close since May 7. The banking sub-index shed 0.4 percent, while electronics sub-index was off 0.1 percent. The Taiwan dollar rose T$0.076 to stand at T$29.949 to the US dollar.