Market Beliefs about Open vs. Closed AI

Daniel Bj\"orkegren

Papers from arXiv.org

Abstract: Market expectations about AI's economic impact may influence interest rates. Previous work has shown that US bond yields decline around the release of a sample of mostly proprietary AI models (Andrews and Farboodi 2025). I extend this analysis to include also open weight AI models that can be freely used and modified. I find long-term bond yields shift in opposite directions following the introduction of open versus closed models. Patterns are similar for treasuries, corporate bonds, and TIPS. This suggests that the movement of bond yields around AI models may be a function of not only technological advances but also factors such as licensing. The different movements suggest that markets may anticipate openness to have important economic implications.

Date: 2025-12
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