The Bank of England set targets on Friday to make its $28.4 billion of holdings in sterling corporate bonds better aligned with government goals to reach net zero carbon emissions, starting later this year.

However, the central bank will not embark on an immediate sell-off of bonds issued by businesses that have high carbon emissions, such as power utilities and oil companies.

“Divestment is a powerful tool, and should remain squarely in the toolkit. But it should be used as a credible threat to reinforce incentives, not an indiscriminate ‘quick fix’,” BoE executive director for markets Andrew Hauser said in a speech hosted by Bloomberg.

The central bank said it would set out plans for the overall emissions of its corporate bond holdings, invest in ‘green’ corporate bonds as they became available, and require bond issuers to publish their emissions to be eligible.

“The precise calibration of this approach will be developed in the coming months,” Hauser said.

The BoE doubled its corporate bond holdings during last year’s COVID pandemic. Bonds were chosen to be representative of sterling issuance by non-financial companies that make a material contribution to the British economy, and represent roughly 10% of issuance that falls into this category.

Bonds recently classed as eligible for purchase include those of energy giant BP, mining company Rio Tinto and German carmakers Volkswagen and Daimler.