What will be the next Black Swan to rattle global financial markets?

The question has been hanging over the investment community for nearly two decades. Stas Melnikov, Head of Quantitative Research and Risk Data Solutions at SAS, a data and AI provider, spoke with Money.it about Black Swan events and the risks that could potentially trigger the next major market shock.

Before joining SAS, Melnikov served as Head of Loss Forecasting for the US Residential Credit Portfolio at JPMorgan Chase, where he was responsible for forecasting losses across the bank’s US residential credit portfolio.

He also previously served as Global Head of Investment Risk at Russell Investments.

Black Swan Events: The Risks That Could Shake Global Financial Markets

The concept of the Black Swan has been in the financial lexicon for years — specifically since 2007, when economist Nassim Nicholas Taleb published his bestselling book, “ The Black Swan: The Impact of the Highly Improbable ”.

The book uses the term Black Swan to describe rare and unpredictable events that are subsequently explained and rationalized, often incorrectly, as if they could have been anticipated, and that, when they occur, trigger violent and far-reaching market reactions.

Regulators have also sought to identify and prepare for extreme risks, although such efforts cannot, by definition, predict a true Black Swan. Central banks such as the European Central Bank and the Federal Reserve regularly conduct stress tests to assess banks’ resilience under so-called worst-case scenarios.

But extreme or worst-case scenarios are not Black Swans, because the defining characteristic of a Black Swan is that it is inherently unpredictable.

Trying to identify the next Black Swan is therefore a daunting task. Yet the question may be more relevant than ever as financial markets confront a growing list of uncertainties: continued geopolitical tensions in the Middle East; the extraordinary rally in Wall Street and other equity markets; uncertainty over the path of oil prices and the potential for new energy shocks; and growing questions over the outlook for AI stocks.

It is no coincidence that terms such as “speculative bubble” and “AI bubble” have become increasingly common in financial market coverage.

Below is Money.it’s interview with Stas Melnikov, who has been involved in designing and conducting numerous stress-testing exercises. His early work developing models of housing markets and consumer behavior helped highlight vulnerabilities in the mortgage market in the years leading up to the 2008 global financial crisis.

Stas Melnikov on the Next Black Swan: Exclusive Interview With Money.it

Question: If you had to identify one or more potential Black Swan events that could threaten the global economy, what would they be?

Answer: By definition, a true Black Swan event cannot be predicted in advance. What we can identify are areas where the global financial system appears increasingly fragile and vulnerable to an unforeseen shock. Current risks about which I am particularly concerned are:

  • A large scale cyber event targeting critical financial or infrastructure systems:
  • A contagion event in private credit and/or shadow banking that spills over into the broader financial system;
  • A loss of confidence in sovereign debt markets driven by rising levels of debt and lack of fiscal discipline;
  • An AI or quantum computing technology leap without proper guardrails.

Key items to consider are the increasing speed of shock propagation and the growing interconnectedness of funding, credit and liquidity risks.

Q: What unexpected event could have the greatest impact on financial markets before the end of 2026?

A: Financial markets are becoming increasingly digitized. Electronic trading is expanding to most asset classes and there is an increasing prevalence of automated trading systems. A severe cyberattack disrupting this infrastructure would quickly impair confidence in those systems, turning operational disruption into a liquidity event that spreads to become a credit shock. Markets today may be underestimating the degree of interconnectedness between cyber and credit risks.

Q: What is the most plausible market shock that investors are currently overlooking?

A: The issue of demographics is a slow moving train wreck that will manifest itself into a shock at some point. Aging populations and rapidly declining birth rates will reshape labor markets, strain social safety nets and alter demand for financial assets. While these trends unfold slowly, they may trigger an abrupt reassessment of growth rates and fiscal sustainability. See Malcom Gladwell’s book “The Tipping Point” for more on how slow moving processes can result in abrupt changes.

Q: If global equity markets were to decline by 20% or more, what would be the most likely catalyst?

A: Today, tech companies are spending massive amounts to build data centers and run AI models. A pull-back in AI capital expenditures (capex) would have a seismic effect.

Q: What is the biggest mistake investors are making in the current market environment?

A: There is complacency around market benchmarks that is becoming increasingly concentrated. The traditional view of diversification of stocks and bonds is outdated and can be adversely impacted by inflation shocks. Careful concentration analysis and risk factor diversification are of paramount importance.

Q: What is the single overlooked risk that could reshape global financial markets before the end of 2026, and why?

A: Inflation risk is not over and will reappear. Continuing de-globalization, militarization, trade frictions and AI infrastructure buildout are all inflationary forces. Current fiscal and monetary policy may not be restrictive enough to keep inflation under control. For the past decade, government bonds acted as a stabilizing force in portfolios during periods of market stress. That may not be the case going forward. With sovereign leverage at historic high levels and inflation risk looming, this assumption needs to be re-examined.

In closing, Melnikov stressed that the focus of risk management should not be on trying to predict the next Black Swan, but on identifying vulnerabilities and strengthening resilience before a shock hits:

“Black Swans are not forecastable. The goal of prudent risk management is not to predict the next crisis, but to identify areas of fragility and build resilience to deal with an array of potential shocks. Investors – including banks and other financial services firms – should use a combination of early-warning signals and scenario analysis to identity areas of weakness to be addressed. Those chasing what they perceive as the next most likely shock will often miss the risks that matter most”.