S&P Downgrades Botswana's Credit Rating as Diamond Market Weakness Strains Fiscal Outlook

S&P Global Ratings downgraded Botswana's long-term sovereign credit rating to BBB- from BBB on March 13, warning that structural weaknesses in global diamond markets will weigh on the country's minerals-dependent economy longer than previously anticipated. The agency simultaneously cut short-term ratings to A-3 from A-2 and kept its outlook at negative, a signal that further downgrades remain possible if fiscal and external balances continue to deteriorate.

In its press release, S&P was direct about the fiscal stakes: "Barring a significant policy adjustment or a recovery in global demand for diamonds, we project Botswana to post a large fiscal deficit through 2029." The agency forecast that deficit reaching 8.9% of GDP in 2026/27, a striking figure for a country that has long anchored its public finances on rough diamond revenues.

That dependence is total and deeply structural. Botswana is the world's second-largest producer of natural rough diamonds, and the sector historically accounted for roughly 70% of exports, about one-third of government revenue, and, as IOL noted in its coverage, approximately a quarter of GDP. Any sustained slump in diamond demand does not merely trim Botswana's budget; it reshapes the entire economy.

The production numbers from state miner Debswana illustrate how severe the contraction has already been. Output fell 27% to 17.9 million carats in 2024, then dropped a further 16% to 15.1 million carats in 2025, leaving production roughly 40% below 2023 levels after the company cut and suspended operations at several mines. Debswana's output is expected to remain flat at approximately 15 million carats through 2026, with no meaningful recovery in sight.

S&P forecast economic growth of only 2.5% in 2026, coming after contractions of 2.8% and 0.4% in the two preceding years. The combination of declining output, weakened government revenues, and a negative sovereign outlook creates compounding pressure on Botswana's fiscal position for years.

The forces driving the diamond slump are not purely cyclical. Lab-grown stones have captured 20% of the global diamond market by value, and in the U.S. engagement ring segment specifically, they now account for up to 50% of volume. Add weak Chinese demand, elevated U.S. tariffs, shifting consumer preferences toward gold jewelry, and broadly depressed luxury spending, and the picture S&P painted is one of structural displacement rather than a temporary correction.

The negative outlook retained on Botswana's rating means S&P has not closed the door on further cuts. The path back to a stable outlook runs through either a meaningful recovery in natural diamond demand or a deliberate policy pivot away from mineral dependency, neither of which appears imminent.