The Wall Street Tax Act of 2025 aims to impose a tax on certain trading transactions involving securities, with the dual goals of generating revenue from financial markets and discouraging excessive trading that can lead to market volatility. The legislation establishes a tax on "covered transactions," which includes the buying and selling of securities and derivatives. The tax rate will start at 0.02 percent for transactions from 2025 to 2027 and will gradually increase to 0.1 percent by 2030, based on the fair market value of the securities involved.