Policy transition risk, carbon premiums, and asset prices

Abstract

We analyze the effects of policy transition risk on asset pricing and the green transition using a global two-sector, macro-finance model of climate and the economy. Policy transition risk results from probabilistic changes between three policy states: no, modest, and ambitious carbon pricing. We show that policy transition risk leads to carbon premiums (i.e. higher expected returns on brown than on green assets), especially if the economy is still quite carbon-intensive and close to the temperature cap, and thus accelerate the green transition. Increased transition risk leads to more precautionary saving and falls in the risk-free rate. We offer extensions to deal with physical risks (temperature-related risk of climate disasters and climate tipping), technology transition risk, and more realistic policy tipping with endogenous transition probabilities. • Policy transition risk leads to carbon premiums and a faster green transition. • Risks of climate-related disasters and climate tipping push up the carbon price. • Climate policy shocks have a significant impact on asset prices and returns. • Price impacts are more pronounced if carbon-intensive capital is more prevalent.

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