Tokyo stocks are likely to maintain their upward momentum to test new record highs next year on optimism that the government's expansionary stimulus measures will boost corporate earnings.While higher yields on the key 10-year government bond above 2.0 percent are expected to have only a limited impact on equities, excessive yen weakness against the U.S. dollar stemming from fears over Japan's deteriorating fiscal health is seen as a downside risk.The benchmark Nikkei Stock Average could climb toward 55,000, surpassing the all-time closing high of 52,411.34 reached in October, driven by fur…READ FULL ARTICLE