I hold EXG, EOI, and ETV......all siblings of EXG. I don't particularly like the "globalness" of EXG, but if you do that's fine I guess. A few months ago I was more optimistic (when you posted) about global stocks and bonds, but less so now.
Go to the CEFconnect web site and at the top, select Fund Screener.
Under US Equity, select Covered Call.
Leverage = Both. Fund Sponsors = All
Click SUBMIT and scroll down.
Columns are sortable by clicking the header.
In the left most column, click the trade symbol for detailed information.