The purpose of this study is to examine the relationship between portfolio diversification, government regulations, and the financial performance of DT SACCOs in Nairobi County, Kenya. It aims to determine the impact of financial asset investment on the financial performance of deposit-taking SACCOs in Nairobi County, Kenya; the impact of loan portfolios on the financial performance of deposit-taking SACCOs in Nairobi County; and the moderating effect of government regulations on the relationship between portfolio diversification and the financial performance of deposit-taking SACCOs in Nairobi County, Kenya. Capital market theory, modern portfolio theory, risk aversion theory, arbitrage portfolio theory, and decision-making theory will serve as the study's foundation. For the period under review, secondary data will be collected from audited annual financial statements included in SASRA reports.