It clearly shows warehouse levels increasing. Prices follow a similar trend in an upward channel (albeit with perhaps a slight pullback recently.
So, in my opinion one of two scenarios is playing out. Either prices are rising (even though supply is increasing) in anticipation of a world wide recovery, or hedge funds have open positions driving the price north (or perhaps a combination of the two). Obviously warehouse levels are not going to continue to rise forever so we need a pickup in demand relatively soon, or I can see base metals prices coming off slightly (in the short term) to accomodate excess supply levels. I believe this is why KZL SP has declined recently.
Good buying for long termers who believe demand will increase to more 'normal' levels over time.
JT
KZL Price at posting:
86.5¢ Sentiment: Buy Disclosure: Held