Rafael Grossi leads trader sentiment as the frontrunner for the next UN Secretary-General largely because of his prominent role as IAEA Director General and his strong performance in the April 2026 interactive dialogues before the General Assembly, where he outlined priorities on nuclear non-proliferation, institutional reform, and crisis response. Rebeca Grynspan trails as a credible multilateralist with deep UN experience in trade and development, while Michelle Bachelet and Macky Sall face headwinds from limited regional endorsements—Chile’s withdrawal of support for Bachelet and the absence of formal African Union backing for Sall—along with questions about their alignment with key Security Council members. These recent public hearings and nomination dynamics have reinforced Grossi’s edge in the selection process ahead of the 2027 transition.