State Street Global Advisors launched two international exchange-traded funds that trade on the American Stock Exchange, according to an SSgA news release. The ETFs are Japan-focused funds based on indexes created by Russell Investment Group and Nomura Securities. The streetTRACKS Russell/Nomura Prime Japan fund focuses on the broad Japanese stock market and measures the performance of the country's 1,000 largest stocks. The streetTRACKS Russell/Nomura Small Cap Japan fund tracks the smallest 15% of companies in the Japanese stock market. SSgA had about $110 billion in ETF assets under management worldwide as of Oct. 31.