The Invesco KBW Bank ETF ( KBWB ), which has been around since November 2011, is a $6B-sized ETF (in terms of assets under management) that is backed by Invesco, an American Investment ManagementAnalyst’s Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from Seeking Alpha) ...