Taiwan's share prices extended their losing streak into the fourth day Thursday, with the weighted index, the market's key barometer, falling 55.35 points, or 0.81 percent, to close at 6,733.23. The local bourse opened at 6,784.91 and fluctuated between 6,784.91 and 6,647.32 during the trading session before closing above the index's three-month moving average of 6,700. A total of 3.53 billion shares changed hands on market turnover of NT$88.84 billion (US$2.69 billion). All eight major stock categories lost ground, with construction stocks dropping the most at 3.4 percent. Banking and financial stocks fell 2.1 percent, paper and pulp issues dipped 1.9 percent, foodstuff shares shed 1.2 percent, plastics and chemicals issues lost 1 percent, textile issues dropped 0.8 percent, cement issues lost 0.4 percent, and machinery and electronics stocks shed 0.4 percent. Losers outnumbered gainers 1,807 to 544, with 131 stocks remaining unchanged. Foreign institutional investors were net buyers of NT$450 million-worth of shares. 