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Re:China Bans Bitcoin Executives from Leaving Country, Miner... by vkou on Wednesday September 20, 2017 @11:34AM (#15294898)
Exchanges can't operate on a fractional reserve principle. Fractional reserve works for banks because:

Cash on hand + Money people owe the bank >= Cash bank owes its customers.

If an exchange is operating in such a manner, this means that:

Cash + BTC on hand < Cash + BTC exchange owes its customers.

We don't call that a fractional reserve. We call it insolvency (And knowingly accepting new deposits in such an exchange is called 'Fraud.')

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