“…Compiled from several review articles of previous research (Daily et al, 2003;Fitza & Dean, 2016;Jenkinson & Ljungqvist, 2001;Kennedy et al, 2006;Ljungqvist, 2007;Loughran & Ritter, 2002;Ritter & Welch, 2002) that IPO under-pricing theories can be studied based on information asymmetry, institutional explanations, ownership and control reasons, and behavioural explanations (see Figure 2). Information asymmetry models based on the asymmetric information problem between issuing firms and underwriters, investors and underwriters, issuers and investors, and informed and uninformed investors; institutional explanations for IPO under-pricing has inspired the emergence of three dominant institutionalbased theories, including lawsuit avoidance, price stabilization, and tax advantages hypotheses; ownership and control theories contend that IPO under-pricing works as an effective mechanism in shaping the shareholder base to deter outside investors from intervening in managing their firms once they are publicly listed; and the last theory was the presence of informational cascades as a behavioural explanation, which is discussed where the central argument is that the IPO market is prone to the presence of "irrational" investors who bid up the price of IPO shares beyond their true value (Jamaani & Alidarous, 2019). Several previous studies related to phenomena under-pricing is according to (Akseptori et al, 2019) concluded that internal factors (Debt To Equity Ratio (DER), Earning Per Share (EPS), Return On Assets (ROA), Company Age (AGE), Company Size (SIZE), Percentage of Shares Offered (PSD) has a significant effect on under-pricing and stock performance, while external factors (Inflation (INF), Exchange Rate (KURS), Bank Indonesia Interest Rates (RATE) have no significant effect on under-pricing and stock performance in companies conducting IPOs in the Indonesia Stock Exchange in the infrastructure, utility, and transportation sector in 2010-2018, which in line with (Oktavia & Handayani, 2018) that the rupiah exchange rate does not affect the Composite Stock Price Index (CSPI).…”