Why Sustainability Must Become Core Financial Risk Strategy

Sustainability is rapidly evolving from a compliance obligation into a central pillar of financial risk management.

For Michiel de Smet, Sustainable Investment Expert at the National Bank of Belgium, the shift reflects growing evidence that environmental and social risks are financially material.

“As data and analytical tools for sustainability-related risks mature, the financial relevance of environmental and social factors is becoming increasingly evident,” he explains.

These considerations are no longer confined to reporting or box-ticking exercises. They are informing risk management and strategic decision-making across portfolios.

Climate change offers a clear illustration. The growing frequency and severity of extreme weather events are generating substantial economic losses, eroding asset values, and triggering regulatory and market responses.

De Smet argues that investors seeking robust portfolios must incorporate both mitigation and adaptation into portfolio management.

At the National Bank of Belgium, this is reflected in portfolio decarbonization targets and structured sustainability integration within asset allocation.

Short-term decision making remains a persistent challenge.

“Gaps in data and cognitive biases, such as recency bias, can drive decisions that may appear beneficial in the short term but fail to capture longer-term systemic vulnerabilities,” he says.

Cost-cutting that overlooks climate or biodiversity exposure may improve quarterly metrics while increasing long-term fragility.

To counter that tendency, organizations must strengthen analytical and operational readiness.

For investors, this includes improving data quality, updating risk assessment tools, and embedding sustainability directly into portfolio management practices.

De Smet highlights that the National Bank of Belgium maintains a dedicated labeled bond portfolio, purchasing green bonds that finance adaptation expenditures. Such targeted allocation demonstrates how sustainability objectives can align with prudent risk management.

The financial consequences of environmental disruption are already visible. Climate change is affecting agriculture, infrastructure, and transport networks across Europe.