Seoul stocks dipped by more than 1 percent Thursday to snap their gains of three consecutive days, after touching a fresh all-time high, as investors cashed in gains amid a sharp rise in international oil prices. After choppy trading, the benchmark Korea Composite Stock Price Index fell 92.03 points, or 1.38 percent, to end at 6,598.87, after rising as high as 6,750.27. Trade volume was heavy at 676.2 million shares worth 34.7 trillion won ($23.4 billion), with losers outnumbering winners 666 to