Global X lithium and battery fund as of today 9 Jan 18 - 3% of assets invested in Orocobre.
https://www.globalxfunds.com/funds/lit/?download_full_holdings=true
Also, while I'm on this thread, with all the expected news flow and increase in lithium prices, I'll predict $12 by the end of the year . I don't think that's too conservative.
