Those who have pension funds or other investors must act now to make up for the falling BP share price. More than £56 billion has now been wiped off the company's market value, since the Deepwater Horizon rig sank, killing 11 men and causing the huge oil leak on April 20. BP was, until this crisis, Britain's biggest company. It made up 7 per cent of the FTSE All Share Index and paid out around 15pc of all the dividend income in Britain. If you have a company pension, it probably invests in a tracker fund. Three-quarters of funds in money purchase pension schemes are invested in trackers, totalling £8.2bn. If your fund tracks the FTSE 100, BP makes up around 6pc of it.