Four years on from the collapse of Lehman Brothers and its devastating fall-out, Transparency International looks at how weak oversight and a lack of transparency contributed to the financial crisis. 'This crisis was not just the result of a few rogue traders placing reckless bets. Corruption, in the form of fraud and a ‘no holds barred’ pursuit of profits, bonuses and growth, infected the whole financial system.' The page also has an interesting timeline of the crisis.