Fixed-income attribution is a way of looking at how different parts of a portfolio of investments in bonds (fixed-income investments) affect its performance. It helps investors to figure out which strategies are helping them make money, and which ones aren't. To do this, it breaks down the performance of the portfolio into different parts, such as the type of bond, the country it is from, the maturity date, and so on. By looking at these different parts, investors can figure out which ones are helping make the portfolio perform well, and which ones need to be improved.