The pool of top-rated names has been shrinking for years. In the S&P 500 today, only Microsoft and Johnson & Johnson carry S&P’s AAA. Compare that to back in 1980, when more than 60 U.S. companies held S&P’s highest rating, a number that fell steadily as balance sheets took on more leverage and as criteria were applied more conservatively.
Sovereigns have followed a similar path. The United States dropped from AAA at S&P in 2011 and at Fitch in 2023. On May 16, 2025, Moody’s lowered the U.S. to Aa1, removing the last remaining AAA among the big three. Those decisions cited the same core issues: rising debt, wider deficits, and political constraints that complicate fiscal repair.
Even among countries that look strong, unanimous AAA across S&P, Moody’s, and Fitch is now a short list. As of late May 2025, ten economies held top marks at all three, including Australia, Canada, Denmark, Germany, Luxembourg, the Netherlands, Norway, Singapore, Sweden, and Switzerland. The count moves occasionally, but the longer-term trend has been down.
There are three practical reasons behind the shrinkage. First, balance sheets changed because the price of money changed. The post-Global Financial Crisis and pre-pandemic decade rewarded leverage. If your goal is to minimize weighted average cost of capital, adding reasonable debt often beats running a fortress balance sheet. The market structure adjusted around that choice. The share of BBB bonds in U.S. investment-grade indices rose from about a quarter in 1990 to roughly half today, while AA and above fell to less than a tenth. That is a clear signal that issuers targeted “good enough” rather than the very top rung.
Second, the bar did not stand still. After 2008, regulators built resolution regimes like TLAC and MREL so senior creditors could absorb losses, and rating agencies dialed back assumptions of government support in their bank models. That change lowers the ceiling that some financials can reach, even if their standalone metrics are strong. You can see it in criteria and commentary that explicitly separate intrinsic strength from systemic support. Same balance sheet, less assumed support, lower attainable rating.
Third, policy math caught up with sovereigns. Public debt rose after the pandemic and then had to be refinanced at higher yields. OECD data show interest costs climbed to about 3.3 percent of GDP across member countries in 2024, overtaking defense on aggregate. As coupons reset higher, fiscal headroom narrows, which tightens the path to AAA even for rich economies with strong institutions.
It is also worth noting why companies stopped aiming for AAA in the first place. The last notch of safety is expensive. To hold it, a management team has to keep leverage and variability of cash flow within narrow bands through the cycle. That usually means fewer buybacks, fewer large acquisitions funded with debt, and more balance-sheet cushion than shareholders demand at today’s spreads. The agencies’ own definitions make the philosophy explicit: AAA is reserved for an “extremely strong” capacity to meet obligations through stress, not just normal times. Very few issuers are willing to trade operating flexibility for that label when funding remains abundant at AA or A.
The U.S. experience is a clean case study on the sovereign side. S&P’s 2011 downgrade cited governance and budget process strains. Fitch’s 2023 move pointed to fiscal deterioration and rising debt. Moody’s acted in May 2025 when interest costs and persistent deficits reduced the cushion consistent with Aaa even after accounting for the advantages of reserve-currency status and deep markets. The rating is still very high, but it is not the ceiling anymore.
Another quiet driver is that access to capital no longer depends as heavily on a public AAA. A growing portion of corporate borrowing has shifted toward private credit and direct lending, where deal terms hinge on sponsor relationships and collateral rather than public index eligibility. Private credit assets under management roughly doubled over the past few years and are commonly cited around 1.5 to 1.8 trillion dollars, with large firms competing to finance multi-billion transactions. In that ecosystem, an issuer can borrow at acceptable terms without maintaining a perfect public rating.
Performance data help explain why the bar is guarded so tightly. Long-run default studies show extremely low cumulative default rates at AAA/AA relative to lower categories, which means a top rating must survive severe, infrequent shocks by design. That design choice makes the population small when the world runs with more leverage and higher base rates.
One more nuance often confuses the picture. Not all AAA labels are calibrated the same way. In China’s onshore market, domestic agencies assign AAA widely, including to many local government financing vehicles and corporates. Recent reporting suggests the share of newly rated corporate bonds receiving AAA exceeded 90 percent in the first half of 2025. Those scores are not comparable to the global scales used by Moody’s, S&P, and Fitch, and investors treat them differently.
Issuers have optimized capital structure for cost, not for perfection. Post-crisis rules have reduced assumed government backstops for banks and raised the bar for senior creditors. Governments used fiscal space to manage shocks, then met a higher rate environment that lifted interest bills and trimmed rating headroom. The result is a smaller group at the very top, with plenty of strong credits clustered one or two notches below. For most borrowers, that is an efficient outcome. As hard as it is to imagine, less top ratings is actually the best result for all parties.