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Many of Bloomberg’s users took to Twitter to vent their frustrations at the technical problems afftecting their terminals, claiming a lack of access to market information is preventing them from carrying out trading activity.

Bloomberg has blamed a ‘combination of hardware and software failures’ for a two-hour outage affecting users of its popular data and messaging terminals.

The problems, which began at 8.20am on Friday, prevented thousands of traders and investors from carrying out trading activity. However, the company said that it has now identified the cause of the outage – said to be related to an unspecified hardware fault - with systems “fully restored”, a spokesperson has claimed. 

"We experienced a combination of hardware and software failures in the network, which caused an excessive volume of network traffic,” the spokesperson said in an email statement.  

“This led to customer disconnections as a result of the machines being overwhelmed. We discovered the root cause quickly, isolated the faulty hardware, and restarted the software."

The company said it will now conduct a review of its multiple redundant systems which “failed to prevent this disruption”. More details on the nature of the fault were not available at this time.

Earlier in the day, many of Bloomberg’s users in Europe and Asia took to Twitter to vent their frustrations at the technical problems affecting their terminals.

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The market data company says it has more than 315,000 subscribers to its Bloomberg Professional terminals, which cost $24,000-a-year (£16,000). The terminals provide real-time financial information, as well as chat services to traders and investors.

However, customers of the service have become increasingly discontent with the cost of the service, while a scandal around Bloomberg journalists being able to track the movements of traders in 2013 dented its reputation.

Ovum financial services analyst, Rik Turner, said that while the outage is “obviously an extremely serious matter” for Bloomberg, it is unlikely that it will result in an end to its terminals being the preferred platform for the majority of financial firms.

“It has held a seemingly unassailable position in the capital markets for decades because, much as the banks and brokerages buying it may have baulked at its prices or some of its commercial practices, the actual end users, i.e. the traders themselves, love its terminals," he said.

"They know their way round them so well, so there is inertia in their attachment to them that has proven all but impossible to disrupt. Even the scandal surrounding Bloomberg’s allowing its journalists to track the movements of traders on their terminals for story leads was something that upset the banks themselves far more than the traders."

Nevertheless, Bloomberg will have to avoid further technical issues if this customer loyalty is not to be eroded in future.

Turner added: "This is far from being the seminal moment when Bloomberg’s fortunes changed, but the onus is clearly upon the company to avoid it being seen, in retrospective, as the moment when they started changing.”