It would be a factor I would consider if I was strictly looking at levered loan CEF's. Given the chase for yield, I'm not suprised those are trading at premiums.

The premise of this article was more targeted at institutional buying of CLO's and also ways that individuals & smaller investors can get exposure. Interestingly, the pure plays on CLO's (Oxford Lane & Tetragon) are trading at substantial discounts to NAV - one reason why I believe they are worthwhile to evaluate for long positions. So not quite the same valuation considerations despite all of their differences.