Western Asset Investment Grade Income Fund Inc. is a closed-ended fixed income mutual fund launched and managed by Western Asset Management Company. It is co-managed by Western Asset Management Company Limited. The fund invests in the fixed income markets of the United States. It primarily invests in investment grade debt, including government securities, bank debt, commercial paper, and cash or cash equivalents. The fund benchmarks the performance of its portfolio against the Barclays U.S. Corporate High Yield Index and the Barclays U.S. Credit Index. Western Asset Investment Grade Income Fund Inc. was formed on March 22, 1973 and is domiciled in the United States.