Government debt managers have the responsibility to issue debt instruments to meet the borrowing needs of governments, to manage the outstanding stock of debt, to retire maturing debt and to contribute to the development of the market infrastructure. The type of debt instruments to be issued and the amounts to be raised depend not only on the volume of the borrowing requirement but also on the liquidity of the various outstanding instruments, preferences of investors and, more generally, on the financial and macroeconomic environment. Raising funds through marketable instruments will depend on factors such as easy access to well-functioning primary and secondary markets (in particular market liquidity) and the presence of well-developed market segments – institutional and retail investors.