The Emergence of Green Swan Events The world is familiar with “black swans”: rare, system-level shocks that arrive suddenly and only later s...

The Emergence of Green Swan Events

The world is familiar with “black swans”: rare, system-level shocks that arrive suddenly and only later seem predictable. Yet financial regulators and central banks are increasingly focused on a related idea. In a 2020 report, the Bank for International Settlements popularised the term “green swan” to describe climate-related financial shocks that share the black swan’s traits, rarity, extreme impact, and hindsight clarity, while differing in one key way: they are driven less by statistical surprise than by climate pressures that are already visible. Green swans are therefore less about “whether” than “when,” and they highlight how limited traditional risk tools can be when climate change introduces deep uncertainty.

Green swans are hard to model because they do not follow neat historical patterns. Climate risk is shaped by nonlinear dynamics and feedback loops that can turn slow stress into sudden disruption. Imagine a rapid shift in policy or technology that forces large volumes of fossil-fuel reserves to be reclassified as stranded assets. A sharp repricing could trigger forced selling and liquidity strains that spread across sectors, moving through linked balance sheets in ways that standard stress tests, built around past crises such as 2008, may not capture. The pathways are also broad: physical risks (storms, floods, droughts, heat) that damage infrastructure and output, and transition risks (regulation, innovation, litigation, consumer shifts) that can weaken business models faster than firms expect.

For central banks, the challenge is real but bounded by their mandates. [I] They can integrate climate scenarios into supervision and financial stability monitoring. [II] But they cannot, on their own, solve the underlying drivers of climate risk. Reducing green swan exposure requires coordinated action across governments (carbon pricing and standards), firms (capital allocation and reporting), civil society (behaviour change), and international bodies (cross-border commitments). [III] This places central banks in a supporting role: not climate policymakers, but conveners who encourage forward-looking scenarios and test the system’s resilience. [IV] Climate change threatens the stability they are tasked with protecting, yet many of the tools they rely on were designed for a world where tomorrow looked much like yesterday.

[Adapted from https://www.bis.org/publ/othp31.htm]

Question 31: Where in the passage does the following sentence best fit?         

They can push for stronger disclosure and better risk management.

A. [I]         B. [II]         C. [III]         D. [IV]

Question 32: The phrase “less about ‘whether’ than ‘when’” in paragraph 1 refers to __________.

A. more about forecasting exact dates than building flexible institutions

B. more about timing a likely shock than debating if it will happen

C. more about denying climate pressure than trusting historical market cycles

D. more about statistical surprise than recognising already visible climate forces

Question 33: The word “They” in paragraph 3 refers to __________.

A. climate scenarios         B. financial drivers         C. central banks         D. underlying mandates

Question 34: According to paragraph 2, which of the following is NOT mentioned as a "transition risk" associated with green swans?

A. Changes in consumer behavior and preferences.         B. New government regulations on carbon emissions.

C. Physical damage to infrastructure from flooding.        D. Legal actions and litigation against large firms.

Question 35: Which of the following best summarises the main content of paragraph 2?

A. Standard financial stress tests are being successfully updated to include the 2008 crisis data to prevent forced selling across linked sectors.

B. Green swans are difficult to predict because climate risks involve complex, non-linear dynamics that can lead to sudden, widespread financial instability.

C. The reclassification of fossil-fuel reserves is the only pathway through which climate change can damage business models and infrastructure.

D. High volumes of fossil-fuel reserves are expected to remain stable unless rapid shifts in policy and technology occur simultaneously by 2030.

Question 36: The word “nonlinear” in paragraph 2 is opposite in meaning to __________.

A. chaotic         B. sequential         C. irregular         D. complex

Question 37: According to the passage, what is the primary limitation of central banks in addressing green swan events?

A. Their inability to encourage forward-looking scenarios or test the resilience of the current financial system.

B. Their failure to integrate climate-related scenarios into their supervision and stability monitoring processes.

C. Their lack of authority to directly resolve the fundamental environmental causes that drive climate-related risks.

D. Their refusal to push for stronger disclosure and better risk management practices among private sector firms.

Question 38: Which of the following best paraphrases the underlined sentence in paragraph 3: “Climate change threatens the stability they are tasked with protecting, yet many of the tools they rely on were designed for a world where tomorrow looked much like yesterday.”?

A. Since climate change endangers financial stability, central banks must abandon all traditional tools that were designed to predict future economic trends.

B. Despite being responsible for maintaining stability, central banks use outdated instruments that are insufficient for the unpredictable nature of climate-related crises.

C. The stability of the financial world is no longer a task for central banks because their tools are only capable of managing historical economic patterns.

D. Central banks are successfully protecting financial stability by utilizing historical tools that were specifically designed to handle the uncertainty of tomorrow.

Question 39: Which of the following can be most likely inferred from the passage?

A. Black swan events are more dangerous than green swans because they are driven by climate pressures that are already visible to regulators.

B. Transition risks are easier for firms to manage than physical risks because innovation and litigation follow predictable historical patterns.

C. Relying solely on historical data from past financial crises may leave the global economy vulnerable to unprecedented climate-related shocks.

D. International bodies are the only entities capable of reducing green swan exposure because they can enforce carbon pricing across all firms.

Question 40: Which of the following best summarises the passage?

A. Green swan events are rare financial shocks that can be easily managed by central banks through the use of standard stress tests and mandates.

B. The reclassification of fossil-fuel reserves as stranded assets is the primary reason why the Bank for International Settlements popularized green swans.

C. Green swans represent a new class of climate-driven financial risks that challenge traditional banking tools and require broad, coordinated global action.

D. Central banks are shifting their roles to become the primary climate policymakers to prevent nonlinear dynamics from damaging global infrastructure.