Investors need to do proper analysis before making a decision in investing. If the investor does not do the right analysis, the investor will experience significant losses. One of the analyzes used is CAPM, and for the next step the researcher evaluates the performance of the stock portfolio. This study aims to analyze the performance evaluation of stock portfolios during the covid 19 pandemic. The research objects were companies registered in IDX 30 during the period January 2020 to July 2022. The result of this study is the Treynor index is the most indicative of conformity without differences between the three measures, as Treynor. Its value is similar to Sharpe and the Jensen index has the smallest difference.

Covid-19 has an impact on the economy, where ADB decreased with estimates in Asian Developing Countries by 3.0 ppts to 2.2%, and for ASEAN by 3.7 ppts to 1.0% (ASEAN, 2020). In addition, one of the indicators that shows that the occurrence of stock market movements, can be seen through the country's stock price index. The Composite Stock Price Index (JCI), which is one of the benchmarks for the Indonesian stock market, on March 5, 2020 was at 5,638.13 and experienced a low on March 24, 2020 at 3,937.63. This study aims to determine the effect of inflation, exchange rate, and TVA on the stock price index in the basic and chemical industry sectors, which in this case uses data in the period January 2020 -June 2022, namely the period where the stock price index of the basic industry and chemical sectors shows a downward trend in April 2020 and November 2020. The sampling technique used in this study was purposive sampling samples so that 64 Companies in the Basic and Chemical Industries Sector were obtained listed on the IDX. The data analysis technique used in this study uses descriptive statistical analysis to describe the data that has been collected. The results of the study for the F test showed that inflation, exchange rates and TVA had a positive and significant effect on the stock price index. While the results of the t-test show that inflation has a positive and insignificant effect, the exchange rate has a positive and significant effect on the stock price index, and TVA has a negative and insignificant effect on the stock price index.

Growing business competition expects companies to pay more attention to ensuring capital accessibility. Fulfillment of capital needs can be obtained both internally and externally from the company. The capital structure is important for every company because it directly affects the financial position of the company, therefore the financial manager must understand the factors that affect the capital structure to maximize the prosperity of the company's shareholders. The purpose of this research is to analyze and explain the influence of firm size, activity, and profitability on capital structure moderated by investment opportunity set in multi-industry sector companies. The population in this research is a multi-industry sector company listed on the Indonesia Stock Exchange, with a research period of 2015 to 2019. The selection of samples in this research used the purposive sampling method. The data analysis techniques used in this research are descriptive statistical analysis, classical assumption test, hypothesis test, and residual test for regression moderation analysis on SPSS. The results of this study showed that firm size and activity had a positive and significant effect, while profitability had a significant effect on the capital structure, Investment opportunity sets (IOS) play a role in moderating the influence of firm size, activity, and profitability on capital structures. The practical implications on this study, for investors who want to invest in the company, can consider the magnitude of the investment opportunites that the company has. Companies that have high investment opportunities it means companies have the opportunity to grow which has an impact on investors’ profits in the future. Companies with high market capitalization are considered good by investors because they can provide good stock returns through high stock prices. For companies, it helps managers in determining optimal capital structure policies in maximizing the company’s profit and creating well-being for investors.