Nouriel Roubini: A Financial Early-Warning System

Nouriel Roubini, writing in Project Syndicate,

Recent market volatility – in emerging and developed economies alike – is showing once again how badly ratings agencies and investors can err in assessing countries’ economic and financial vulnerabilities. Ratings agencies wait too long to spot risks and downgrade countries, while investors behave like herds, often ignoring the build-up of risk for too long, before shifting gears abruptly and causing exaggerated market swings.

Given the nature of market turmoil, an early-warning system for financial tsunamis may be difficult to create; but the world needs one today more than ever. Few people foresaw the subprime crisis of 2008, the risk of default in the eurozone, or the current turbulence in financial markets worldwide. Fingers have been pointed at politicians, banks, and supranational institutions. But ratings agencies and analysts who misjudged the repayment ability of debtors – including governments – have gotten off too lightly.

In principle, credit ratings are based on statistical models of past defaults; in practice, however, with few national defaults having actually occurred, sovereign ratings are often a subjective affair. Analysts at ratings agencies follow developments in the country for which they are responsible and, when necessary, travel there to review the situation.

This process means that ratings are often backward-looking, downgrades occur too late, and countries are typically rerated based on when analysts visit, rather than when fundamentals change. Moreover, ratings agencies lack the tools to track consistently vital factors such as changes in social inclusion, the country’s ability to innovate, and private-sector balance-sheet risk.

And yet sovereign ratings matter tremendously. For many investors, credit ratings dictate where and how much they can invest. Ratings affect how much banks are willing to lend, and how much developing countries – and their citizens – must pay to borrow. They inform corporations’ decisions regarding whom to do business with, and on what terms.

Given the problems with ratings agencies, investors and regulators recognize the need for a different approach. Investors have tried to identify good alternatives – and have largely failed. Assessments of risk such as sovereign interest-rate spreads and credit default swaps react (and often over-react) fast; but, because they reflect only the market’s understanding of risk, they are not a systematic mechanism for uncovering hidden risks and avoiding crises. Indeed, the recent sudden rise in market volatility suggests that they are as bad as rating agencies at detecting the early warning signs of trouble.

Note:  Even in an imperfect environment, capital must be employed for many if one is to remain in the business of investing. In many cases, the nature of investing is not subject to the level of risk or absolute risk, but rather the decision to invest is based on the relative risk.

Regulators, meanwhile, are now starting to require banks to develop their own internal ratings processes. The problem is that few institutions have the tools and expertise to do this alone.

Note: Lack of tools and expertise drive these banks to collude in their opinions, not so different from the practice of undergraduates, who, not knowing what the answer to the weekly exercise given by the professor, discuss and decide to hand in the same answer.

A comprehensive assessment of a country’s macro investment risk requires looking systematically at the stocks and flows of the national account to capture all dangers, including risk in the financial system and the real economy, as well as wider risk issues. As we have seen in recent crises, private risk taking and debt are socialized when a crisis occurs. So, even when public deficits and debt are low before a crisis, they can rise sharply after one erupts. Governments that looked fiscally sound suddenly appear insolvent.

Note: I’ve mentioned the study of flows in a previous post and have further thought about one way we can represent and study this, to be discussed further in a future post.

Roubini concluded:

An assessment of sovereign risk that is systematic and data-driven could help to spot the risks that changing global headwinds imply. To that extent, it provides exactly what the world needs now: an approach that removes the need to rely on the ad hoc and slow-moving approach of ratings agencies and the noisy and volatile signals coming from markets.


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