RIKUMAHU, B.; AKHMAD, M. F. Comparison of black-scholes models using historical volatility and garch volatility in collar strategy as hedging efforts for towr and tbig stocks. International Journal of Accounting and Management Information Systems, [S. l.], v. 1, n. 2, p. 143–161, 2025. DOI: 10.35912/ijamis.v1i2.3043. Disponível em: https://goodwoodpub.com/index.php/ijamis/article/view/3043. Acesso em: 31 jul. 2025.