This book provides a wider scope on the effect of NSE index, Foreign exchange rate, and Interest rate and Inflation rate in determining macroeconomic environment affecting stock return volatility on Nairobi Stock Exchange. Secondary data from NSE, Central Bank of Kenya (CBK) and Kenya National Bureau of Statistics (KNBS) were employed in the study. The results of the study have been presented in five chapters each handling introduction, literature review, study design and summary of the study findings and conclusion. The major investigations presented in the study were mainly concentrated around the selected variables. The finding of this research provides robust understanding by policy makers, policy analysts, investors, and academics of the dynamics of the stock returns in Kenya particularly, with regard to leverage and impact of news. The study recommends the government and the regulator to come up with policies that will help stabilize Foreign exchange rate, Interest rate and Inflation rate fluctuation thus creating investor confidence in the securities market.