UK Finance Minister Rachel Reeves plans to alter fiscal rules to allow more borrowing for public investment, targeting up to £50 billion for infrastructure projects. This change involves adopting a new debt measurement, likely public sector net financial liabilities (PSNFL), which considers financial assets and liabilities, providing more borrowing flexibility. The shift aims to reverse a predicted decline in public investment, with support from leading economists and the IMF. Although Reeves' budget will still include some cuts to public services, she emphasizes borrowing is for long-term investment rather than day-to-day spending. The proposed fiscal adjustments have led to increased yields on British government bonds, reflecting market anticipation of higher borrowing. Reeves' approach seeks to foster economic growth and capitalize on opportunities in sectors like life sciences and clean energy.