US family office Avestar Capital has opened a Singapore hub, positioning the city-state as its Asia-Pacific base as it expands beyond the United States. The new entity, Avestar Singapore Pte. Ltd., will be led by Zal Devitre, a wealth management executive with more than two decades of international experience, the firm said. Founder and chief executive Xerxes Mullan said Asian ultra-high-net-worth families increasingly require cross-border advice that integrates investment ma