Former treasury futures trader here. I traded my own money on the floor of the CBOT and electronically. Prior to trading on the floor, I was a broker that handled institutional clients. Started in 1987 and left in 2016. Traders never retire, they just fade away.
Any way I am basically a 3 fund portfolio guy, but my fixed income is primarily individual treasuries and CD's and some BND. Soon to be 60 years old, with 50/50 portfolio. My niche is buying dips in VTI and VEU aggressively during corrections. I ain't buying this dip though.
I wonder will your holding blow up if we have another financial crisis? I never heard of CEF's, I will check them out.