Would excluding China from a rare-earth-elements ETF make it even rarer? A forthcoming ETF from Sprott Asset Management poses that question. Earlier this month, the company filed the Sprott Rare Earths Ex-China ETF (REXC), a fund that could launch by April, trading on the Nasdaq. It would add to a line of critical materials and energy transition exchange-traded funds the company already offers, with the nuance being that it avoids exposure to the world’s largest source of rare earth elements. “This is a ...