Investment Grade
Investment grade refers to the upper tiers of a creditworthiness rating that rating agencies assign to states and companies. Whoever carries this rating is considered a comparatively safe debtor and pays lower interest rates on borrowed money.
When a state or a company borrows money, the lenders want to know how likely it is that they will get it back. For this purpose there are specialized firms called rating agencies. The three best-known are Standard & Poor’s, Moody’s, and Fitch. They examine the debtor’s figures and assign a rating that ranges from AAA to D. The upper half of this rating scale is called investment grade: here the agency considers timely repayment fairly likely. Everything below this is called non-investment-grade or, colloquially, junk bond.
The boundary between BBB- and BB+
At Standard & Poor’s, the dividing line runs between BBB- and BB+. This looks like a tiny difference, but it has enormous consequences. Many large investors are, under their own rules, only allowed to buy bonds with investment grade. These include pension funds, insurance companies, and many funds that manage money for millions of savers.
If a company slips below this threshold, these investors often have to sell its bonds — even if they don’t want to. This drives the price down further, and new loans become more expensive for the company. In the financial world there is a specific term for such a fall: fallen angel. The carmaker Ford was a prominent example in 2020.
Conversely, rising into investment grade is a major win for a debtor. The pool of potential buyers suddenly becomes much larger. And lower interest rates can amount to hundreds of millions of euros per year on billions in debt.
What a credit rating is made of
A rating agency first looks at the hard numbers. How high is the debt relative to earnings? How much cash is available? How stable have revenues been in recent years? An initial assessment emerges from these figures.
Softer factors are added to this. Analysts assess the industry, the competitive situation, and the quality of management. For states, political stability and tax revenues play a major role. In the end, a committee decides on the rating — not a single person and not a formula alone.
A common misconception: a rating is not a forecast of a bond’s price and not a buy recommendation. It only says something about default risk. And it can be wrong. Before the 2008 financial crisis, many securities carried top ratings that turned out to be nearly worthless shortly afterward. This misjudgment has permanently damaged the reputation of the agencies.
Where the rating turns up in the news and in portfolios
In economic news you regularly read that an agency has upgraded or downgraded a country. Germany has held the top rating of AAA for decades. Greece lost its investment grade during the euro crisis and only got it back in 2023. Such news moves the interest rates a state must pay on new debt.
Technology companies are affected too. Anyone building data centers for artificial intelligence often needs billions in borrowed capital. Corporations like Microsoft or Alphabet have top ratings and borrow money very cheaply. Smaller providers without investment grade pay significantly higher interest rates — a tangible competitive disadvantage.
Retail investors mainly encounter the term with funds and ETFs. Names like “Euro Corporate Bond Investment Grade” mean: the fund only buys bonds from the upper rating range. Such products are considered less volatile but yield less return than funds holding high-yield bonds. That is the usual trade-off in financial markets: less risk for less return.