Alfonso Diaz is the Founder and Portfolio Manager of Black Harbor Capital, where he leads a multi-asset global macro investment strategy, overseeing portfolio construction, risk management, and derivatives strategy.

He has over 17 years of experience investing across global markets, including equities, fixed income, credit, rates, and FX.  His approach integrates global macro, relative value, and systematic frameworks, with a focus on identifying asymmetric opportunities, managing downside risk, and optimizing risk-adjusted returns.

Prior to founding Black Harbor, Alfonso led portfolio risk strategy and derivatives hedging for Blackstone’s Multi-Asset and Global Credit platform, partnering with CIOs and senior leadership to shape investment strategy and balance sheet optimization across liquid and private credit markets.

Alfonso began his career at Goldman Sachs as a Derivatives Trader managing special situations and index arbitrage strategies.  He subsequently held trading, portfolio strategy, and asset financing roles at Macquarie Capital and Société Générale, focused across U.S., Europe, and Asia-Pacific markets.

Alfonso earned a BBA in Corporate Finance and Risk Management, graduating with highest honors from St. Mary’s University, and is a Chartered Financial Analyst (CFA) charterholder.