What Is Standard & Poor's (S&P)?

Standard & Poor's Explained


Standard & Poor's (S&P) is a business intelligence company that falls under the corporate umbrella of S&P Global. Its purpose is to provide high-grade credit risk research on public and private company debt, including governments.

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Definition and Example of Standard & Poor's

The names "Standard" and "Poor" come from two financial companies that merged in 1941. Standard & Poor's specializes in providing credit ratings for bonds, countries, and other investments, but that's just one of the thousands of financial market services offered by S&P Global. The company uses its vast access to data to provide customized analysis and establish market indexes.

Acronym: S&P


The best-known index offered by S&P Global is the S&P 500, which is a stock market index that tracks the largest publicly traded companies in the U.S., representing roughly 70% to 80% of the available market capitalization.

Origins of Standard & Poor's

There is a level of irony in a company called "Poor's" measuring wealth, but that name came from one of the company's founders, Henry Varnum Poor. In 1860, he published the History of Railroads and Canals of the United States. The book was about a lack of quality information available to investors.

His book planted the seeds of corporate transparency, and over the following 160 years, they grew into an advanced system of corporate and national credit ratings.

How Standard & Poor's (S&P) Works

The S&P rating is a credit score that describes the general creditworthiness of a company, city, or country that issues debt.

The Standard & Poor's company rates how likely debt will be repaid from the entity in question. The ratings are for informational purposes only—they aren't investment recommendations, nor do they predict the probability of default. S&P also rates the creditworthiness of individual bonds. There are several different types of bonds, all of which vary in their ratios of risk to return.


You can use S&P ratings to help you decide whether to buy a bond. They will also give you a sense of how a country's economy is doing, which can help you with other investments like forex trades or foreign stocks.

How S&P Creates the Ratings

S&P analysts create the ratings. They get information from published reports, such as annual reports, press releases, and news articles. They also interview the management of the company they are rating. Using these resources, the analysts assess the company’s financial condition, operating performance, and policies. Most importantly, they form an opinion about the company's risk-management strategies.

In the beginning, Standard & Poor's charged a subscription fee for access to its credit reports. In 1968, it changed its revenue structure and started charging the companies it was rating, instead of the investors using the ratings.

In a 2002 congressional hearing, S&P said that it had changed its revenue structure to address rising costs and increased demand for credit ratings, though that hasn't stopped critics from speculating about the ability of S&P to evaluate its paying customers adequately.

How the Ratings Scale Works

An S&P credit rating is a letter grade. The best is "AAA," which means that it is highly likely that the borrower will repay its debt. The worst is "D," which means the issuer has already defaulted.

Standard & Poor's uses multiple letters (sometimes accompanied by pluses or minuses) to indicate strength. In total, there are 17 ratings, even though Standard & Poor's only uses four different letters. The company may double or triple the letters—the more the better. Ratings can also include a plus sign (which is better than standalone letters) or a minus sign (which is worse than standalone letters).

S&P is just one of the three major credit rating agencies in the U.S. All three use similar ratings systems, though you may notice some small differences among the way those ratings are conveyed. For instance, a "BBB+" rating from S&P is comparable to a "Baa1" rating from Moody's.

Types of Standard & Poor's Ratings

The Standard & Poor's company rates the creditworthiness of many entities that sell debt.

Bond Ratings

A bond that receives a high letter grade can pay a lower interest rate than one with a lower grade, because it isn't as risky, according to S&P. In exchange for the relatively safe investment, investors will settle for smaller returns. Companies, cities, and countries work hard to keep a high letter grade so they can save money by issuing bonds with low interest rates. The safest bonds are known as "investment-grade."

The table below shows the specifics for long-term bonds. Letter grades of BB+ or lower are considered "speculative." You may also hear them referred to as "high-yield" or "junk" bonds. These companies have to pay more in interest to offset the increased risk.


Some investors like junk bonds because as long as the issuer doesn't default, the investor can make more money.​

Ratings Scale for Long-Term Bonds

The following chart provides further detail on what each letter grade means for the issuing entity.

Letter Grade Grade Capacity to Repay
AAA Investment Extremely strong
AA+, AA, AA- Investment Very strong
A+, A, A- Investment Strong
BBB+, BBB, BBB- Investment Adequate
BB+, BB Speculative Faces major future uncertainties
B Speculative Faces major uncertainties
CCC Speculative Currently vulnerable
CC Speculative Currently highly vulnerable
C Speculative Has filed bankruptcy petition
D Speculative In default

S&P offers ratings on short-term debt, though on a slightly different scale. S&P also provides outlook ratings, which attempt to project how the entity will be faring in six months to two years, compared to how it's doing now. Those ratings are positivenegativestable, or developing.

Country Ratings

S&P publishes ratings for 130 countries. The company analyzes how likely it is that a country will default on its sovereign debt. There are five areas of assessment: institutional, economic, external, internal, and monetary. Institutional and economic assessments are combined to create an institutional and economic profile of the country. The remaining three areas of assessment are combined to create a flexibility and performance profile.

These profiles are based on the analysis of factors including:

  • Whether the country's government is stable and follows sustainable fiscal policies
  • The country's economic strength and its growth prospects
  • Foreign direct investment
  • Whether the nation's central bank is independent of its government and uses sound monetary policy

Notable Happenings

Some critics blame the S&P and other rating agencies for the 2008 financial crisis. S&P gave AAA ratings to mortgage-backed securities as late as 2006, but in 2007, as the housing market began its downturn, 83% of those securities were suddenly downgraded. Critics have voiced concern that perhaps S&P was reluctant to give a low grade to its paying customers.

A Congressional inquiry later determined that these risky conditions were exacerbated by decades of deregulation of the financial industry.

As the recession worsened, governments increased spending to stimulate the economy. As a result, in 2011, S&P downgraded U.S. Treasury debt from AAA to AA+. S&P was concerned that Congress and President Obama hadn't put together a solid enough debt-reduction plan. The credit downgrade sent the Dow plummeting in August 2011.

Many analysts noted the irony in the U.S. downgrade. S&P may have helped cause the recession by giving good ratings to mortgage-backed securities that defaulted. It then punished the government for the debt created by that same recession.

Key Takeaways

  • Standard & Poor's (S&P) is a business intelligence company that falls under the corporate umbrella of S&P Global.
  • S&P specializes in providing credit ratings for bonds, countries, and other investments.
  • S&P creates ratings by getting information from published reports, such as annual reports, press releases, and news articles.
  • Along with other ratings agencies, the S&P may have had a role in the 2008 financial crisis by creating undue trust in mortgage-backed securities.
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The Balance uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. S&P Global. "Who We Are."

  2. S&P Dow Jones Indices. "S&P 500."

  3. Harvard Business School Historical Collections. "Poor's Manual: The Rise of Business Analysts."

  4. S&P Global. "Understanding Credit Ratings."

  5. U.S. Securities & Exchange Commission. "Standard & Poor's Rating Services." Role and Function of Credit Rating Agencies in the U.S. Securities Markets, Public Hearing (Nov. 15, 2002).

  6. S&P Global. "S&P Global Ratings Definitions."

  7. Rothschild & Co. "Corporate Credit Ratings: A Quick Guide," Page 46.

  8. S&P Global. "Guide to Credit Rating Essentials," Page 19.

  9. Fidelity Investments. "Bond Ratings."

  10. S&P Global. "S&P Global Ratings Definitions."

  11. Council on Foreign Relations. "The Credit Rating Controversy."

  12. Financial Crisis Inquiry Commission. "The Financial Crisis Inquiry Report," Page 19.

  13. S&P Global. "Research Update: United States of America Long-Term Rating Lowered To 'AA+' On Political Risks And Rising Debt Burden; Outlook Negative."

  14. The Committee for a Responsible Federal Budget. "Understanding the S&P Downgrade," Page 8.

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