There have been numerous corporate fraud cases in the past decades, some of which caused by overoptimism and over-expansion of company's business. Managers believe that when they have increased the size of their companies, they become "too big to fail". You are required to research on two different fraud cases which took place in Australia or in the U.S. that are related to over-expansion and discuss the fraud types, reasons behind their fraud and provide your views on how they could have been prevented.