The second highest rating in Moody's Long-term Corporate Obligation Rating. Obligations rated Aa1 are judged to be of high quality and are subject to very low credit risk. Rating one notch higher is Aaa. Rating one notch lower is Aa2

Nearby Terms

A2 A3 Aa1 Aa2 Aa3

Investing Essentials

Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day

Portfolio opportunity set

The expected return/standard deviation pairs of all portfolios that can be constructed from a given set of assets.

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