The effect on the share price depends on the extent to which the market has already absorbed the lost value.

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None of this has had any lasting effect on the share price of Sturm Ruger, the only pure handgun play on the market.

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So is the likely effect on share-price volatility of quasi real-time data: would it make some investors even more short-termist in their outlook?

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Surely in an efficient market investors would look past the accounts to the underlying economic reality, argues Mr Grundfest, so that the effect on the share price would be negligible.

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He said they were likely to have a positive effect on the company's share price.

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During the period Apple has litigated the rubber banding effect the company has seen its share price decline.

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The maelstrom of bad news has grown so loud that even a resounding scientific success has only a slight effect on a company's share price.

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As I write the US markets are not yet open so we cannot see the effect that the same news is having upon the Microsoft share price, nor that of Google.

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