Islamic finance is based on the principles of shariah (Islamic law). This entails the removal of interest (riba), excessive uncertainty (gharar), gambling (maysir) and the trade of prohibited items, such as alcohol, within the contracts and structuring and application of financial products when compared to conventional financial products. Parties must share the risks and rewards of a business or transaction, the transaction should have a real economic purpose without unnecessary speculation and not involve any exploitation of either party.