Yes, In order to invoke federal jurisdiction the SEC uses the fact that they communicated beyond state lines over the wire. This is why all the charges are called wire fraud. Relevant: https://www.law.cornell.edu/wex/commerce_clause
Basically everything is interstate commerce. See Wickard v Filburn. It's why growing your own pot or making your own machine gun earns you federal jail time, even if they never enter commerce or leave the state. Basically whether commerce leaves state lines means nothing in terms of whether there is interstate commerce; even growing your own crops to feed to your own animals is considered interstate commerce.
Whether a wire left the state means dick to whether the federal government has constitutional authority over it, per supreme court.
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