Western Asset Investment Grade Income Fund Inc.

PERFORMANCE AT-A-GLANCE

Our Performance Rating is based on total return to investors over the last three years, including share price appreciation and distributions to shareholders. This total return is stated net of the expenses and fees charged by the fund. This is then weighted to give longer term performance a slightly greater emphasis. Thus, two funds may have provided identical returns to their shareholders in the last 12 months, but the one with the better performance over the last three years will receive a higher performance rating.

Performance Rank is divided into five categories: Well Above Average, Above Average, Average, Below Average & Well Below Average.

RISK AT-A-GLANCE

Our Risk Rating is based on the level of volatility in the fund’s monthly returns. Like performance, risk is also measured over a three year period using several statistical measures – standard deviation, semi-deviation and a drawdown factor – as barometers of volatility. Funds with more volatility relative to other funds are considered riskier, and thus receive a lower risk rating. By contrast, funds with more stable returns are considered less risky and receive a higher risk rating. The maximum risk rating is B+ since all stock-based investments involve at least some degree of risk.

Risk (Volatility) is divided into five categories: Highest Volatility, Above Average Volatility, Average Volatility, Below Average Volatility & Lowest Volatility.

MANAGEMENT INFORMATION