2019. THE DIFFERENCE ANALYSIS OF ABNORMAL RETURN AND TRADE VOLUME ACTIVITY BEFORE AND AFTER RAMADHAN EFFECTS ON FOOD AND BEVERAGES COMPANIES LISTED IN INDONESIAN SHARIA STOCK INDEX (ISSI). JOURNAL OF BUSINESS STUDIES AND MANGEMENT REVIEW. 2, 2 (Jul. 2019), 88-93. DOI:https://doi.org/10.22437/jbsmr.v2i2.7221.