Enron Corporation was formed in 1985 through the merger of two energy companies and grew to become the largest natural gas and electricity trader in North America. Through aggressive strategies and accounting practices that hid losses, Enron saw its stock price rise dramatically in the late 1990s. However, in 2001-2002, Enron collapsed into bankruptcy after its complex accounting schemes and off-balance sheet debt were revealed through a whistleblower and SEC investigation. Top executives were later convicted of fraud for artificially inflating profits through these practices.