Goldman Sachs (GS), in a year-end client note, advised buying credit default swaps on Spanish government debt as one of the firm's top macroeconomic trades for 2010. Credit default swap buyers, in exchange for periodic payments similar to insurance premiums, receive a payout if the debt they are related to defaults. Goldman says that Spain has high levels of debt in both the public and private spheres, a lack of political resolve to bring spending in-line with revenues, and a financial system that seems to be hiding its problems (as previously noted by DailyFinance). Spain is a part of the "PIIGS" acronym, a kind of recession-counterpart to the "BRIC" emerging markets that also encompasses Portugal, Italy, Ireland, and Greece, a collection of countries that investors worry may not be able to repay all of their debts.