An experimental trading simulation on X shows Grok 4, an AI model developed by xAI, outperforming the broader U.S. stock market. In the test, a virtual portfolio managed by the model grows 8.3% from late November 2025, starting from an initial value of $100,000.
Over the same period, the S&P 500 gains just 1.9%, meaning the AI-driven strategy delivers returns more than four times higher than the benchmark. The simulation highlights Grok 4’s ability to allocate capital and time market moves within a controlled environment.
The experiment adds to growing interest in AI-assisted investing, particularly as models developed by Elon Musk’s ventures are tested beyond research settings. However, results from simulations do not necessarily translate to real-world trading performance.
