Transition Linker Pricing

Sammanfattning

As the urgency of addressing climate change intensifies, innovative financial instruments are needed to align capital markets with sustainability goals. This thesis explores the concept of the \textit{transition linker}, a hypothetical performance-linked sovereign bond whose cash flows depend on greenhouse gas emission reduction targets, as outlined in its Nationally Determined Contributions under the Paris Agreement. Transition linkers aim to provide transparent, verifiable incentives for climate action by embedding emissions performance into bond pricing. Using a stochastic modeling approach, future emission trajectories are simulated with a Geometric Brownian Motion model to estimate the likelihood of meeting emissions targets. These probabilities are then used to derive theoretical fair values for both \textit{premium} and \textit{zero-cost} transition linker structures. A case study involving Germany, France, and Italy demonstrates how differences in emission trends and volatility directly affect pricing outcomes. The results showed that transition linkers are conceptually straightforward to model and could be practically implemented using existing financial frameworks. However, under certain parameter conditions, particularly for zero-cost linkers, the implied coupon adjustments can become unrealistic. This highlights important design trade-offs and the need for further refinement before real-world application. Overall, the transition linker represents a promising addition to the sustainable finance toolkit, offering a more standardized and data-driven alternative to current sustainability-linked bonds.