ABSTRACT: This study aims to analyze: (1) The Heuristic effect on Islamic stock investment decisions, (2). The effect of herding on sharih stock investment decisions, (3). The effect of prospects on Islamic stock investment decisions. This research was conducted in 6 (six) big cities in Indonesia, which is a country with the largest Muslim population in the world, the number of samples in this study were 141 investors who were young investors aged 17 to 25 yearsold. This study used a quantitative descriptive research method using SPSS version 25 analysis tool. Results: (1). Heuristics have a positive and significant effect on Islamic stock investment decisions, (2) Herding has a positive but not significant effect on investment decisions, (3) Prospects have a positive but not significant effect on Islamic stock investment decisions.
KEYWORDS: Financial Behavior, Investment Decision, Islamic Stock.