Here area few closed end funds, preferred stock funds for your watch list. I own them all. I don't actually consider them all that speculative longterm, but make no mistake they are ALWAYS volatile in a rough market. Pull up a long-term chart. They survived the GFC and they'll get roughed up again. You may recognize one from my 2019 Perfect Port contest. All have a long history of big dividends. Did I mention they are volatile? 
Run by managers with a good long-term REP. Not telling anyone to buy today. I add tiny amounts. I'll get more serious with my adds eventually. They can definitely drop further.
JPS- A Nuveen preferred stock income fund. Monthly Divs. 9.1%
DNP- Utility preferred income fund, it may be less volatile, Monthly Divs 8.6%
ARCC- Corporate Loan sharks, I definitely expect this one to drop more at some point, the riskiest of the bunch IMO, quarterly payer 17.5%
RQI- Real Estate, Cohen and Stearns run, I expect it will drop more the next few months, Monthly payer, 12%
The term SWAN is inappropriately used on Seeking Alpha until I just want to puke. I seriously don't stress modest positions of these in my port. IMO they are one helluva a lot safer income streams than many of my high Div individual stock holdings. They run like a tech stock when then is some hope of blue skies. They are cyclical. I trim them when it just starts looking too good to be true and the yields drop due to share appreciation. The yields are usually not this crazy high.
Hope this helps someone, and I am NOT telling anyone to buy them today. I'm not adding today.
Run by managers with a good long-term REP. Not telling anyone to buy today. I add tiny amounts. I'll get more serious with my adds eventually. They can definitely drop further. JPS- A Nuveen preferred stock income fund. Monthly Divs. 9.1%
DNP- Utility preferred income fund, it may be less volatile, Monthly Divs 8.6%
ARCC- Corporate Loan sharks, I definitely expect this one to drop more at some point, the riskiest of the bunch IMO, quarterly payer 17.5%
RQI- Real Estate, Cohen and Stearns run, I expect it will drop more the next few months, Monthly payer, 12%
The term SWAN is inappropriately used on Seeking Alpha until I just want to puke. I seriously don't stress modest positions of these in my port. IMO they are one helluva a lot safer income streams than many of my high Div individual stock holdings. They run like a tech stock when then is some hope of blue skies. They are cyclical. I trim them when it just starts looking too good to be true and the yields drop due to share appreciation. The yields are usually not this crazy high.
Hope this helps someone, and I am NOT telling anyone to buy them today. I'm not adding today.