Jobs' health problems may bode ill for Apple
How crucial is the head of your organisation to the performance of your business? As the markets digested news that Apple chief executive Steve Jobs is to take another open-ended medical leave of absence, his company's share price fell to $334 - though it did recover to around $341 later.
We all like to think we are indispensable. Mr Jobs, it seems, definitely is.
But despite the stellar sales of the must-have iPad, there are fears that it doesn't have enough new products in its pipeline to maintain its supremacy.
The Consumer Electronics Show in Las Vegas took place earlier this month, and the company has often avoided the event - but stolen its thunder by making announcements about new products while the show takes place.
There was silence from the company this year. Let's hope it doesn't bode ill for Apple.