About

I am an independent researcher with a background in physics, working on problems at the intersection of finance, taxation, and quantitative methods.

My current work develops along two connected lines. The wealth tax neutrality framework is a mathematical analysis of how wealth taxes interact with investment decisions and financial markets, motivated by observing that the Norwegian wealth tax debate often lacked a rigorous theoretical foundation connecting the tax to standard asset pricing theory. Spectral portfolio theory grew out of the statistical physics formulation of this framework and uses random matrix theory to study the spectral structure of portfolios, wealth concentration, and the general conditions under which perturbations to portfolio objectives are neutral.

Contact

Email: indrefjorden@pm.me

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í hugar — Old Norse, also modern Icelandic: “in my mind.” Otherwise not related to the great Icelandic band Hugar.