Olympus struggles to contain crisis over $687m payment
25 October 2011 Last updated at 01:44 BST
Shares in the Japanese camera maker Olympus have lost more than half of their value in just over a week, as it struggles to contain a growing financial scandal.
There are reports that the FBI is now investigating a payment of $685m that the firm made in relation to the purchase of a British company in 2008.
The BBC's Roland Buerk explains why the firm has been engulfed by crisis in such a short period of time.