Dollar rises on trade deal hopes, Aussie steady after RBA holds fire

TOKYO (Reuters) - The U.S. dollar advanced against the yen on Tuesday thanks to growing optimism the United States and China are on the verge of reaching a preliminary agreement to scale back their bruising trade war.The yen and the Swiss franc, two currencies that are often bought as safe havens during times of economic or political strife, nursed losses as investors became more comfortable taking on risk.The Australian dollar held steady after the Reserve Bank of Australia (RBA) left monetary..