A Goldman Sachs Group Inc. unit won a bid to halt Singaporean wealth-management client Oei Hong Leong's lawsuit over trading losses on the Brazilian real in favor of private arbitration. The ruling was made in a closed hearing today at Singapore's High Court. Oei's lawyer Siraj Omar said he planned to appeal the decision. Edward Naylor, a Hong Kong-based spokesman for Goldman Sachs, declined to comment on the verdict.