"Your point which I disagreed with was that there have to be charges (or a civil case) before there's a subpoena."

Actually, I think I qualified my statement by saying "I think" or something to that effect.  But whatever, it's all good and I learned a little something about Grand Jury Subpoenas (which is cool). The purpose of my initial post was to raise the possibility that Gox/Mk may not be the direct targets of the alleged subpoena (i.e., that the subpoena is related to another case). I believe you actually agreed with this.

Suggestion: next time, say "why" you disagree instead of asserting it without any explanation.  That'll save us time in getting to the right answer.