Today, investors can assess the credit quality of a company or sovereign with a few clicks. Financial statements, ratings, market data and research reports are readily accessible across the globe. But in the 19th century, investing was far less certain. Information travelled slowly, disclosures were inconsistent, and many investment decisions were driven more by reputation and speculation than by verified facts.

In that uncertain environment, two men, Henry Varnum Poor and Luther Lee Blake, helped change the way financial markets understood risk. Before modern Credit Rating Agencies became well-known in global finance, Poor and Blake laid the groundwork for the structured financial analysis and organised market intelligence that eventually shaped the credit rating industry.

Henry Varnum Poor: Bringing Clarity to a Growing Market

As railroads expanded rapidly across the United States during the mid-1800s, they attracted enormous investor interest. Yet, despite the vast sums flowing into the sector, reliable financial information about many railroad companies remained difficult to obtain.

Henry Varnum Poor, a Lawyer and Financial Analyst, recognised the dangers of this information gap. Investors needed more than optimism and market rumours; they needed facts. In much the same way, modern credit rating agencies exist to reduce information asymmetry between issuers and investors by providing independent assessments of credit risk.

In 1860, Poor published History of Railroads and Canals in the United States, a detailed compilation of financial and operational information on railroad companies. For many investors, it became an essential guide in understanding which companies appeared financially stable and which carried greater uncertainty.

Poor’s work introduced something revolutionary for its time: the idea that investment risk could be evaluated through organised, verifiable information rather than informal market speculation alone.

His publications later evolved into Poor’s Manual of the Railroads of the United States, a widely respected reference that helped investors make more informed decisions in an increasingly complex financial environment.

Luther Lee Blake: Standardising Financial Intelligence

Several decades later, Luther Lee Blake built upon that foundation during a period when industrialisation and corporate expansion were accelerating rapidly.

By the early 20th century, investors were no longer focused solely on railroads. Industrial companies, utilities and large corporations were becoming dominant forces within the economy, creating a growing demand for broader and more standardised financial information.

Recognising this shift, Blake founded the Standard Statistics Bureau in 1906. His objective was straightforward but highly significant: to provide investors with consistent, organised corporate statistics that could support better financial analysis.

What distinguished Blake’s approach was the emphasis on comparability and structure. Instead of fragmented company information scattered across different sources, investors could now access financial data presented through more uniform reporting standards.

In many respects, Blake helped strengthen the movement towards systematic financial intelligence, reinforcing the idea that transparent and standardised information was essential for efficient capital markets.

The Convergence of Two Legacies

For years, the organisations associated with Henry Poor and Luther Blake operated independently, each contributing to the growing field of financial information services. However, as financial markets became larger and more interconnected, the value of combining analytical expertise with statistical reporting became increasingly apparent.

In 1941, Poor’s Publishing merged with Standard Statistics to form Standard & Poor’s.

The merger brought together two complementary strengths: Poor’s tradition of financial analysis and Blake’s structured statistical reporting framework. Together, they formed an institution that would eventually become one of the most recognised names in global credit assessment and market analysis.

The legacy of Messrs Poor and Blake extends far beyond the creation of a successful financial institution. Their real contribution was helping financial markets move from uncertainty towards structured analysis and informed decision-making.