European markets open lower after Wall Street selloff

European stock markets opened lower on Friday, following Thursday's sharp decline on Wall Street. Helsinki's exchange opened down about one percent, while the Stoxx Europe 600 index fell 1.5 percent. Japan's Nikkei index dropped six percent on Friday, closing its worst week in over six years with a 9.3 percent weekly loss. South Korean and Taiwanese benchmark indices initially fell over eight percent before authorities intervened to curb selling. In the US on Thursday, the Nasdaq fell 5.5 percent, its biggest drop in over a year and a half, while the S&P 500 lost 4.3 percent. Chipmakers led losses, with Nvidia plunging about nine percent.