This study aims to detect the reasons about why customers are changing their formats often. It describes how often and what percentage of people shift from one format to another. It identifies the people moving within the intra format and with the inter format too. It found that there is no significant relationship between age, monthly family income and money spent with the format. The study indicates that there is significant relationship between the number of MBOs and the format. It concludes that shifting of customers takes place more between the MBOs than with the other formats.