Q: Is the sentence in bold a subjunctive mood and how to understand it? 
In fairness, though, investors couldn't have found adequate shelter in the yuan even had they wanted to. Despite all the hype about the
  yuan's growing stature, the universe of yuan assets in which global
  funds can invest is minuscule. And size matters when it comes to
  measuring the importance of international currencies.

Can the sentence in bold be parsed in the following:

In fairness, though, investors couldn't have found adequate shelter in
  the yuan even had they wanted to.
  = In fairness, though, investors
  couldn't have found adequate shelter in the yuan even if they had
  wanted to.

But I don't know the meaning of it. 
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A: You're spot on. Let me give another example so my answer looks better to get me more votes:

Had I been there on time, I'd be dead. (Gotta love depressing examples.)

This is identical in meaning to:

If I had been there on time, I'd be dead.

It's a strange pattern of words and letters and difficult to deduce a meaning from. In general, I wouldn't recommend dropping the 'if' as it normally makes a sentence much clearer.
One more example:

Were I rich man, I'd yubby dibby dibby dibby dibby dibby dibby dum.
If I were a rich man, yubby dibby dibby dibby dibby dibby dibby dum.

