The aim of this study is to analyze whether the stock prices decrease at ex-dividend date in Indonesia Stock Exchange (IDX) that is determined by amount of dividend drop-off ratio (DDR). This study also attempts to investigate the differences the stock prices decrease at ex-dividend date based on Investment Opportunity Set (IOS). Sample consist of the companiesthat announced the divid... https://parisnaturalfoodes.shop/product-category/all-purpose-clean-lotion/