Yen gains as risky assets lose traction, pound and euro shaky

By Shinichi Saoshiro and Ian Chua TOKYO/SYDNEY (Reuters) - The yen gained broadly on Tuesday as risky assets lost traction and revived demand for the safe-haven currency, while the sterling and euro were shaky after suffering hefty losses on uncertainty over Britain's membership in the European Union. The euro touched 123.71 yen , its lowest since April 2013. Tokyo's Nikkei gained early on Tuesday following an overnight surge on Wall Street, but soon flagged and stood unchanged by midday.