The Motley Fool·2026-01-16 09:06Core Insights - The stock market experienced significant gains during President Trump's administration, with the S&P 500 closing up 16% in 2025, marking the third year of a bull market [1] - Trump's tax policy, particularly the Tax Cuts and Jobs Act (TCJA), has been a major driver of corporate investment trends, leading to a surge in stock buybacks [3][8] - The TCJA reduced the corporate income tax rate from 35% to 21%, the lowest since 1939, which has incentivized companies to invest in share repurchases [9][10] Stock Market Performance - The S&P 500 index rose by 16% in 2025, following a turbulent period related to Trump's trade policies [1] - During Trump's first term, major indices like the Dow Jones and Nasdaq saw substantial increases, with the S&P 500 rising by 70% [2] Impact of Tax Policy - The TCJA has led to a significant increase in corporate buybacks, with S&P 500 companies on track to repurchase an estimated $1.02 trillion in shares for 2025 [12] - Prior to the TCJA, quarterly buyback activity for S&P 500 stocks was between $100 billion and $150 billion, which surged to between $200 billion and $250 billion post-TCJA [13] Corporate Buybacks - In Q3 2025, S&P 500 companies bought back $249 billion worth of their own stock, down from a record $293.5 billion in Q1 2025 [12] - Apple has been a leader in share repurchases, buying back over $816 billion since 2013, with $90.7 billion spent in fiscal 2025 [17] - Alphabet ranks second in buybacks among S&P 500 companies, having repurchased $342.4 billion over the last decade [18] - Nvidia has also engaged in significant buybacks, totaling $115.1 billion over the last decade, with a recent annual buyback approaching $52 billion [21] Conclusion - The combination of Trump's tax policies and the resulting corporate strategies has led to a robust environment for stock buybacks, significantly impacting the financial landscape of major companies like Apple, Alphabet, and Nvidia [22]