If the amount has to be transferred, it would go through the Fedwire, the US RTGS. Cost $25 probably and you could literally transfer $10 Billion for the same price. Just have to have the money! :)
How are large-value bank transactions executed in practice?
Can RTGS be used to transfer funds from overseas into a US bank?1 ansHow are very large sums of money transferred between parties or institutions?1 ansCan the source and destination of a wire transfer be tracked by third parties?1 ansWhat happens if a wire transfer is sent to a bank account that does not exist?1 ans