KanawatTH/iStock via Getty Images If you've not heard of SRN Advisors or their Siren ETF brand, that's understandable. Their two key ETFs, one of which we're looking at today, were acquired in November 2020. Our subject of the day is the Siren NexGen Economy ETF (BLCN), an actively managed equity ETF that focuses on companies engaged in blockchain technologies. BLCN Basics BLCN was incepted on January 17, 2018, carries an ER of 0.68%, a gross AUM of about $35 million (net assets of about $32 million, an ...