Torsten Asmus For income-seeking investors, closed-end funds (CEFs) offer relatively high distributions and the potential to buy these shares at a discount to the fund's NAV. But these are lesser known fund structures. So many advisors and investors unfamiliar with CEFs may opt to invest in them through a familiar wrapper like ETFs. The universe of ETFs of CEFs is small. But one ETF - the Invesco CEF Income Composite ETF (PCEF) - has significantly more assets and a longer history than the rest. This is a lo ...