| Summary: | <p>The mining and energy sector is still the driving force for economic development and community empowerment, especially around mining and energy activities. Therefore, increased investment in the mining and energy sectors needs to be increased and balanced with stricter safety and environmental policies. This paper aims to formulate a quadratic investment portfolio optimization model, and apply it to several stocks in the mining and energy sectors. In this paper, it is assumed that risk is measured using Value-at-Risk (VaR), so that the optimization modeling is carried out using the quadratic investment portfolio approach to the Mean-VaR model with risk-free assets. Furthermore, the model is used to determine the efficient portfolio surface based on several values of risk aversion levels. Based on the results of the analysis, it is found that an efficient portfolio surface has a minimum portfolio return value with an average of 0.766522 and a VaR risk of 0.038687. In addition, the results of the analysis can be concluded that the greater the level of risk aversion, the smaller the VaR value, which is followed by the smaller the portfolio average value.</p><p><strong>Keywords: </strong>Mining and energy sector, risk free assets, investment, Value-at-Risk, portfolio optimization.</p><p><strong>JEL Classifications: </strong>A12, C61, G11, Q48</p><p>DOI: <a href="https://doi.org/10.32479/ijeep.11165">https://doi.org/10.32479/ijeep.11165</a></p>
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