No details were released on how the BoJ will carry out its rescue mission, and big lenders, which had risen by more than 15% in two days, drifted back. Mizuho Holdings, the world's largest bank, was down 4.5%. The pressure on the Nikkei was increased by large falls in electronics stocks after Nasdaq's overnight dive of 2.8%. This followed a profit warning from computer services giant Electronics Data Systems.