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They are not running a separate Blockchain and equating their system with how Blockchain works is quite misleading. I work in finance and use Bloomberg's system daily. It's essentially an online data provider/analytics platform running in a terminal-like environment. I don't think they would sneak in a private Blockchain without clients knowing about it. Even if they would, what for?

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I wouldn't be surprised if someone in the IT department explained to him that they are using some kind of consensus based mechanism (zookeeper, etcd, consul etc), that works just like a blockchain, to manage the bloomberg infrastructure. He then goes on tv and tells the world that bloomberg is using The Blockchain. Just wild speculation but its seems plausible to me.

Edit: a quick google lead me to Bloomberg's consul deployment cookbook: https://github.com/bloomberg/consul-cluster-cookbook/blob/ma...

zookeeper, etcd, and/or consul function according to something only trivially different from Nakamoto Consensus? That would be news to me. His IT dept must have misinformed him.

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