The surprising selection of Sanae Takaichi as president of Japan's ruling party may further push up the Nikkei stock index to the 50,000 threshold, aided by a weaker yen as prospects of an imminent interest rate hike by the Bank of Japan recede.The upward momentum of the key index, however, may be short-lived due to political uncertainty as fiscal dove Takaichi may find it hard to implement economy-supporting policies with her Liberal Democratic Party leading a minority government.Boosted by optimism about expansionary fiscal measures, the Nikkei surged 4.75 percent Monday to end at a fresh…READ FULL ARTICLE