The Invesco Preferred Shares UCITS ETF seeks to track the BofA Merrill Lynch Diversified Core Plus Fixed Rate Preferred Securities index. The BofA Merrill Lynch Diversified Core Plus Fixed Rate Preferred Securities index tracks fixed rate preferred securities. The index contains only securities, which have been issued in the USA and are denominated in US-Dollar. Issuers may come from other countries, but then these countries must hold a rating within the Investment Grade range. Issuers only need a rating of BB- or higher to be eligible for the index.