NEW YORK (TheStreet) - The yen's weakness in 2013 has helped spur the Nikkei index to record highs.The Bank of Japan adopted an accommodative policy this year in an attempt to reignite economic growth. The policy reduced the value of the yen and helped Japan's equity index achieve a growth rate not seen since the 1970s. Now investors want to know if further stimulus will be injected to help the economic recovery keeps pace. Coming into 2013, the Japanese government looked helpless in its fight against deflation. Inflation was tepid and growth in both gross domestic product and financial assets were lagging foreign counterparts. Now led by Prime Minister Shinzo Abe, Japan has embarked on an unprecedented stimulus injection to reverse its economic woes. FXY) over the past few months.