In my opinion, ZTEM hasn't shown itself of value simply because copper mining and market conditions have been deteriorating for years. Even now, base metals prices are sliding and approaching new near-term lows.

For instance, copper at the moment is $2.53, having fallen about nearly 14 precent in leass than 2 months.

Boston Consulting is watching this, of course, so it may not be so amazing that they await an improving environment.