This might be the reason of the sectors downturn:...

This might be the reason of the sectors downturn:
http://www.copyright link/business/...ak-as-australian-exports-soar-20180115-h0ihps

Business intelligence firm Roskill is Bearish on the market over the next 3 years, saying that Spdumene prices will drop to US$12k/t by 2021. and that there will be significant oversupply

Roskill managing director Robert Baylis:
"The big issue is this wave of spodumene supply from Australia, where is it going to get processed and what is going to happen in terms of competition between producers?" he said. "There is too much coming too quickly ... the mine production of spodumene concentrate is outgrowing demand quite significantly."

Whilst this only addresses spodumene in Australia, I think everyone will be have been effected under the lithium umbrella.

I have my own opinions about this and Roskills competency, however we'll leave that for another time.
Please DYOR