Simulation of U.S. Tax Policy Shifts Reveals Market and Fiscal Implications

A computational analysis examined a radical tax policy shift: eliminating federal income tax for households earning under $50,000 annually, while increasing marginal rates for those earning over $1 million to 55%. Under this model, federal revenue would decline by approximately $1.2 trillion annually, assuming current spending levels. To offset the shortfall, the government would likely rely on increased borrowing or restructuring of existing programs. The simulation projected that defense and energy sectors would face disproportionate impacts. With defense spending funded through general revenues, a $380 billion gap in annual funding could force program cuts or delayed procurement, affecting contractors such as Lockheed Martin and Northrop Grumman. In the energy sector, higher corporate tax rates on profits above $50 million could reduce reinvestment, potentially leading to a 7% drop in capital expenditures across oil and gas firms, including ExxonMobil and Chevron. Equity markets responded to the model’s implications with increased volatility. The S&P 500 index showed a projected 6.3% decline in a worst-case scenario, while the VIX index spiked to 32.5, signaling heightened investor anxiety. The analysis also indicated that Apple (AAPL) and other tech firms with high profit margins might face a 14% reduction in after-tax earnings under the proposed structure, affecting long-term growth forecasts. While the scenario is purely hypothetical and not reflective of current policy, the model underscores the sensitivity of fiscal and market outcomes to structural tax changes. It also illustrates how shifts in tax burden could influence sectoral performance and investor behavior, particularly in capital-intensive industries.