In the collective imagination, financial markets seem to function primarily through the availability of money, interest rates, or central bank decisions. However, another, much less visible mechanism now influences a growing share of global financing. In many financial transactions, it is no longer just the ability to borrow that matters, but also the quality of the assets an entity can offer as collateral. In other words, the global economy is increasingly dependent on collateral.

The term remains technical, but its role has become central in contemporary finance. When a bank borrows from another institution, when an investment fund carries out certain transactions, or when a central bank provides liquidity, collateral is often required. This collateral can take various forms: government bonds, financial securities, receivables, or other assets considered sufficiently safe. The more secure the asset is deemed, the more sought after it becomes.

This logic took on particular importance after the 2008 financial crisis. Before this period, part of the financial system operated on a relatively high level of trust between institutions. The market collapse profoundly altered this functioning, as regulators subsequently strengthened prudential requirements and increased demands for collateral to limit systemic risks.

Since then, banks and financial institutions have had to lock up more assets considered safe in order to secure certain transactions. Sovereign bonds from highly rated countries, particularly American and German, have become especially sought-after benchmarks in this collateral economy.

The sums involved give an idea of the scale of the phenomenon. The global market for repurchase agreements, better known as the repo market, represents several trillion dollars in daily transactions. In this system, institutions exchange liquidity for securities temporarily pledged as collateral. While it may appear to be a highly technical market, it constitutes one of the central financing channels of global finance.

However, the availability of collateral considered beyond reproach is not unlimited. This is precisely where a question that has become important in several economic research studies arises: the scarcity of "good collateral." Certain assets are so sought after that they end up exerting a direct influence on global financing conditions.

US Treasury bonds occupy a special place in this balance. The Treasury market now exceeds $28 trillion, and these securities serve as a widely used benchmark in international financial transactions. When a portion of these assets becomes less available or more difficult to mobilize, tensions can quickly spread throughout the financial system.

The liquidity crisis that struck the US repo market in September 2019 illustrated this reality. Despite an environment where liquidity seemed abundant, rates on certain transactions skyrocketed. The US Federal Reserve then had to intervene quickly, injecting tens of billions of dollars to stabilize the situation.

This evolution is gradually changing the traditional understanding of financial markets. An economy may have significant capital, but still experience tensions if assets considered sufficiently safe become scarce or concentrated among a few players.

African economies remain less directly exposed to these sophisticated mechanisms, but they are not entirely detached from them. African states, banks, and businesses also operate within a global financial system where risk perception strongly influences access to financing.

In several countries across the continent, the perceived quality of sovereign debt plays a significant role in borrowing costs. A downgrade in credit rating or a deterioration in certain fiscal indicators can quickly alter investor appetite and increase the cost of available financing.

This transformation is less visible than debates on interest rates or public debt, but it profoundly influences global financial flows. As markets become more regulated and more sensitive to collateral, the ability to hold assets considered safe is itself becoming a strategic resource.