On September 28, 2026, Nvidia executed a dual-pronged maneuver that reshaped both corporate finance and the architecture of autonomous artificial intelligence. In a single day, the chip giant authorized a historic $150 billion increase to its stock buyback program and launched the Nvidia Open Agent Safety Platform—an open-source framework designed to stop rogue AI agents from bypassing system controls. The announcement addresses two distinct pressures facing the company: Wall Street's demand for capital allocation efficiency amid staggering hardware revenues, and the engineering community's growing alarm over autonomous agent "drift." The $150 Billion Capital Return Monolith Nvidia’s financial footprint has reached…