LONDON — World stock markets slumped again today with the Nikkei index in Japan closing at its lowest in 26 years as the financial crisis drove up the yen, piling the pressure on the country's exporters.

Tokyo's Nikkei 225 index closed down 6.4 percent to 7,162.90 — the lowest since October 1982. Hong Kong's Hang Seng Index tumbled 12.7 percent to 11,015.84, its lowest close in more than four years and biggest daily decline since 1991.

European markets followed Asia lower, with benchmarks in Britain, Germany and France trading down more than 4 percent in early trading. The FTSE 100 index was 190.31 points, or 4.9 percent, lower at 3,693.05, while Germany's DAX was down 182.81 points, or 4.3 percent, at 4,112.86. France's CAC-40 was the worst performing European index, down 184.65 points, or 5.8 percent, at 3,009.14.

In oil, crude prices weakened after OPEC's move to cut production in an attempt to halt the declines. Light, sweet crude for December delivery was down $2.24 to $61.91 a barrel.

Oil prices have plunged more than 57 percent from a record $147.27 in mid-July.