US stocks are fluctuating between positive and negative territory as investors await earnings from key companies while the Bank of Japan made a historic move and German investor confidence surges. Dow (INDEXDJX:.DJI) futures fell 0.10% to 13 563. S&P 500 (INDEXSP:.INX) futures dropped 0.11% to 1 477.20. Nasdaq (INDEXNASDAQ:.IXIC) futures ticked up 0.05% to 2 735.25. The yen rose to 88.72 its highest level against the dollar in eight months after the Bank of Japan announced that it will follow the US Federal Reserve in adopting a program of unlimited asset purchases and formally aim for 2% inflation. Starting ...