Quantitative screens help to rapidly narrow down attractive candidates from the database of 500-plus closed-end funds (CEFs) for further due diligence and investigation. The "High-High-Low" was inspired by a member of CEF/ETF Income Laboratory, who wrote:
Stanford, you should do a follow up article on CEFs that distribute 8%-plus, have 90% or more coverage and trade under NAV. What does that look like in today's world? How many funds are doing that?
What are the Z scores? I think many investors would be interested who are pushing for higher yield to identify best in