Seoul stocks fell for the first time in four sessions Friday, as foreign-led selling pressure weighed on the market and investors turned cautious ahead of Federal Reserve Chair Kevin Warsh’s keynote speech at the central bank’s Jackson Hole symposium. The speech, scheduled for 10 a.m. Friday (local time), is drawing close attention as the market looks for clues about the central bank’s next moves and the conditions that could warrant an interest rate adjustment. Previous Fed chairs have used the annual gathering in Wyoming to signal broad shifts in monetary policy, but it remains unclear how much guidance Warsh will offer in his first major address at the event. The benchmark KOSPI opened at 6,846.54, down 0.95 percent from the previous session, and remained in negative territory throughout the day. The index failed to turn higher, ultimately closing at 6,788.88, down 1.79 percent. Foreign investors led the selling, offloading a net 1.76 trillion won ($1.28 billion) worth of shares, while institutional investors sold 284 billion won. Retail investors moved in the opposite direction