Lac got upgrade and downgrade, but upgrade is responsible for SP going up lately, I think.

 "...the shares of Lithium Americas Corp. (NYSE:LAC) has been pegged with a rating of Buy by ROTH Capital in its latest research note that was published on May 03, 2018. The Basic Materials company has also assigned a $9.50 price target. ROTH Capital wasn’t the only research firm that published a report of Lithium Americas Corp., with other equities research analysts also giving their opinion on the stock..... "