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This study aims to explain and prove the hypothesis regarding the influence of investment decisions, financing decisions, and dividend policies on firm value in coal sub-sector companies listed on the Indonesia Stock Exchange (IDX) during the 2021–2023 period. This study used a quantitative approach with a purposive sampling method, resulting in 10 companies as research samples. Data analysis was conducted through classical assumption tests to ensure the fulfillment of regression analysis requirements, followed by hypothesis testing using multiple regression analysis. Data processing was carried out using E-Views software version 13. The results showed that partially, investment decisions have a positive and significant effect on firm value, with a probability value of 0.0000, which is smaller than the 0.05 significance level. This finding indicates that the more appropriate a company's investment decisions are, the higher the company's value is reflected in its stock performance in the capital market. Conversely, the financing decision variable does not have a significant effect on firm value, with a probability value of 0.3796, which is greater than 0.05. This indicates that the funding structure, whether derived from equity or debt, did not directly affect firm value during the study period. Similarly, the dividend policy variable did not significantly influence firm value, with a probability value of 0.7493 > 0.05. This means that the amount of dividends distributed was not a determining factor in firm value in the sample studied. However, simultaneously, all three independent variables—investment decisions, financing decisions, and dividend policy—were shown to have a significant effect on firm value, with a probability value (F-statistic) of 0.0000 < 0.05. This confirms that the combination of these three factors collectively contributes to changes in firm value in the coal sub-sector.

This study aims to determine the effect of financial literacy, financial behavior and overconfidence on investment decisions in generation Z of the Faculty of Economics, Islamic University of Kadiri. This type of research is quantitative research. The data for this study were obtained through questionnaires and literature studies. The analysis techniques used were Validity Test, Reliability Test, Classical Assumption Test, Multiple Linear Regression Analysis, t-test, F-test and Determination Coefficient Test. The results of the t-test of the financial literacy, financial behavior, overconfidence variables on investment decisions with sig <0.05. The results of the F test can be concluded that financial literacy, financial behavior, overconfidence on investment decisions have a simultaneous and significant effect with sig. <0.05.

This study aims to determine the effect of ROE, EPS, DER, and ROA on PBV. This type of research is quantitative research. The data for this study were obtained through secondary data. The population in this study were all property companies listed on the IDX for the 2019-2022 period. The sample in this study was 44 financial reports with the sampling technique using purposive sampling. Data analysis technique using eviews. The results of the study showed that the partial t-test results of the ROE and EPS variables had an effect on PBV with a significance value of less than 0.05. The DER and ROA variables had a negative effect on PBV with a significance value greater than 0.05. The results of the simultaneous F-test of ROE, EPS, DER, and ROA on PBV had a positive and significant effect with a significance value less than 0.05.

This study aims to determine the effect of profitability and debt policy on Company Value at PT Kalbe Farma Tbk for the period 2012-2022. This type of research is quantitative research. The data for this study were obtained through secondary data. Based on the total sampling method, the total research sample was 44 in the form of financial reports of PT Kalbe Farma Tbk. The analysis techniques used were classical assumption tests, multiple linear regression analysis, hypothesis tests and determinant coefficient tests. The results of the study showed that the partial t-test results of the profitability variable had a negative and insignificant effect on company value, Debt Policy had a positive and significant effect on company value. The results of the simultaneous F-test of the profitability variable and debt policy had a positive and significant effect on stock prices.