What Credit Rating Agencies Actually Do

Ask most investors what a sovereign credit rating measures and the answer arrives quickly: the probability that a government repays its debt. This description captures something true, though it leaves out most of the work. It treats credit rating agencies as instruments, dials that convert fiscal data into a letter grade. The reality, visible in almost any week of sovereign debt reporting, is considerably more interesting. Credit rating agencies assess financial conditions, evaluate institutions, interpret policy, anticipate events that have not yet occurred, and compress all of this into a judgement that a bond trader can act on in seconds. The letter grade is only the visible surface. The evaluative work behind it is the real product.

Reuters’ coverage of Gabon’s revised 2026 budget, published on 21 July, offers a compact illustration. On the surface the story is straightforward: a government has widened its projected deficit, cut revenue forecasts by 22 percent, and authorised a Eurobond issuance of up to 1.5 billion US dollars while a new International Monetary Fund programme remains unresolved (Goko, 2026). Underneath that surface, the episode reveals at least four distinct evaluative functions that sovereign credit rating agencies routinely perform.