Green Quantitative Easing

What is a Green Quantitative Easing?

Green quantitative easing (GQE) is a form of monetary policy implemented by central banks such as the European Central Bank (ECB) that is similar to classical quantitative easing, in which central banks purchase securities. However, the key difference is that GQE focuses on purchasing assets that finance sustainable and environmentally friendly projects, such as green bonds.

While classical QE aims at temporarily stabilizing a country’s economy, green quantitative easing is designed to meet the long-term commitments of central banks. The primary objective of GQE is not economic growth but to assist in the economy’s transition to sustainable development. This involves supporting renewable energy, green investments, and the broader green economy.

By purchasing green bonds and other financial assets linked to sustainable projects, central banks aim to promote investments that contribute to reducing carbon emissions and combating climate change. GQE aligns with international accords like the Paris Agreement, emphasizing the role of monetary policy in fostering a greener and more sustainable economic model.

Green Quantitative Easing Explained

Since the onset of the financial crisis, many central banks globally have implemented quantitative easing (QE) programs. Through these programs, central banks have issued money to purchase sovereign and corporate bonds. Although these purchases have reduced bond interest rates, there remains a lively debate on their effectiveness in stimulating economic activity, which has been their main aim.

Green quantitative easing (GQE) differs from traditional QE. Instead of buying any type of bond, central banks focus on purchasing bonds issued by firms or governments that intend to fund projects focused on energy efficiency, renewables, and other environmentally friendly investments. These purchases can reduce the cost of borrowing for green projects, thereby encouraging firms and governments to undertake green investments aimed at reducing carbon emissions.

The primary aim of green QE is not to enhance economic growth but to contribute to the fight against climate change. By buying green bonds and other financial assets associated with sustainable projects, central banks like the European Central Bank (ECB) can support the transition to a green economy. This, in turn, aligns with international commitments such as the Paris Agreement, emphasizing sustainable development and environmental protection.

Green QE can also positively impact employment by boosting economic activity in the green sector, which tends to be more labor-intensive. By promoting green investments, central banks can play a crucial role in fostering a sustainable and resilient economy. The effectiveness of green QE in achieving these goals lies in its ability to lower the cost of green loans and support projects that drive renewable energy and other green initiatives.

Furthermore, GQE contributes to stabilizing financial markets by ensuring financial stability through investments in low-risk, high-impact green projects. By integrating GQE into their monetary policy, central banks can simultaneously address economic challenges and environmental imperatives, making it a vital tool for sustainable development and transitioning to a low-carbon economy.

Advantages

1. Central Bank Support. Central Bank can buy green bonds issued by both public and private organizations, providing significant support for sustainable projects.

2. Job Creation. A GQE programs can have a positive impact on job creation by increasing economic activity in the green sector.

3. Risk Mitigation. Central bank support can help mitigate risks for green bond investors, making these investments more attractive.

4. Lower Interest Rates. By buying green corporate bonds, central banks help lower the interest rate on these bonds. This encourages corporate interest in investing in renewable energy and energy efficiency projects.

5. Cost of Borrowing. The lower cost of borrowing encourages companies to issue bonds rather than take bank loans, fostering more green investments.

Efficiency

Green quantitative easing (GQE) is effective, but its impact is modest. Research indicates that GQE could limit the rise in global temperature by at most 0.04ºC by 2100 compared to a scenario with no policy changes. This limited impact becomes even more pronounced in less extreme scenarios where only a portion of the central banks’ portfolio is tilted towards green investments.

Two counteracting forces explain why the overall effectiveness of green QE is more limited compared to other policy tools like carbon taxes. For instance, a low carbon tax of USD 13.6 per tonne of CO2, equivalent to USD 50 per tonne of carbon, is found to be four times more effective than GQE.

These findings align with other studies, such as those by Benmir and Roman (2020) and Ferrari and Landi (2022), suggesting that while GQE contributes positively to climate goals, it may require complementary measures to achieve substantial climate impact. Despite its modest effectiveness, green QE can still play a role in supporting the transition to a green economy by promoting green investment, fostering economic growth in the green sector, and encouraging sustainable development.

Example

An example of green quantitative easing (GQE) in action can be seen in its modest impact on global temperature reduction. Research indicates that GQE can limit the rise in global temperature by at most 0.04ºC by 2100 compared to a scenario with no policy changes. In a less extreme scenario, where only a portion of the central banks’ portfolio is tilted towards green investments, the climate impact of GQE is even more limited. This modest effectiveness is highlighted when compared to other policy tools such as a carbon tax, where a relatively low carbon tax of USD 13.6 per tonne of CO2 is found to be four times more effective than GQE. Despite its limited impact, GQE still contributes to the fight against climate change, especially when combined with other measures like carbon taxes.