After users in financial centres around the world flocked to Twitter to complain of the unexpected outage of terminals, Bloomberg technicians began repair operations that started bringing some blanked terminals back on line at around 0945 GMT.
"Significant but not all parts of our network experienced a disruption today," a Bloomberg spokesman said to AFP in an message emailed to AFP at around 1145 GMT.
"We have restored service to most customers and are making progress in bringing all parts of the network back online. We apologise to our customers."
It is little wonder that business and finance professionals in financial capitals like London, Singapore and New York noticed the Bloomberg breakdown immediately -- and began expressing their concern over it on social media posts just as fast.
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Bloomberg terminals feed movements of global equity, commodity, foreign exchange and derivative markets to worldwide subscribers. Many of those are themselves traders and strategists in the global financial sector, and consider the service an essential tool.
When their screens went blank, many of those professionals were left without information they require to do business -- including the terminal's application many use to make trades.
"Those function using Bloomberg data, which makes this a real problem."
Breakdowns in the Bloomberg system are extremely rare, and many finance professionals found themselves stranded and stunned when their screens went blank.
Trading volumes in Europe were down due to the breakdown, analysts said, and the British government was forced to postpone an emission of Treasury bills as it uses Bloomberg's bidding system.