A cynic might suggest that Tesla Motors is little more than the automotive equivalent of a dot.com company.

They might also point out that the funds it appears to have been capable of first borrowing from, and then paying back to the US taxpayer are at best opaque, and at worst hollow to the core.

It does seem somewhat extraordinary, after all, to discover that such a relatively new and unknown car company has been able to generate sufficient funds to pay off such a huge loan nine years earlier than expected

The fact that Tesla Motors has also raised some $900m this month alone in stock and debt offering deals, and is expected to raise a further $100m using the same process within the next week or so, does make you wonder, or at least want to ask: where is the actual money coming from?