There is a long standing debate on the various forms of investment in the growing marketplace as to which is best for the individual investor needs. Two similar types of investments are mutual funds and exchange-traded funds (ETF), which are both securities that are made up of a pool funds. They are comparable in concept but have key differences that make this study unique. Mutual funds are much more commonly used and are more prevalent in investment publications. This study addresses the benefits and drawbacks of mutual funds and ETFs and how their structures influence returns over a period of time. The purpose of this study was to take historical data of both mutual funds and ETFs to find their returns and see which, if either, outperformed the other based on several different calculations and performance measures. To improve the validity of this study, we found funds from both the technology and utility sector, for each investment vehicle in order to evaluate different classes of risk. We kept the study consistent and compared technology mutual funds to technology exchange traded funds, and so on with the utility sector. We created four portfolios consisting of around eight to ten high quality funds based on criteria. Results indicated that ETFs outperformed mutual funds in both the utility and technology sectors. In order to adjust for risk, we ran Jensen's measure and found that ETF's still outperformed mutual funds. This is significant because mutual funds are highly regarded in the investment world and often thought of as better than ETFs mainly due to their active management and long term results as they have been around for longer than ETFs. This study proves that investors should be putting more money into ETFs because they yield higher returns over time and cost less in fees, allowing the investor to retain a larger portion of their investment.