They're all trading, what I don't understand is why Series N is on Pink and the others Grey. It doesn't make sense to me. It doesn't value K, L, and M any less than N in the bankruptcy proceedings based on trading or its share price.
If you're not flipping these, each will give you a $25 claim in the bk, but the trustee will file the claim so you don't have to. If there's a 10 percent payout on these notes, that's $2.50. If there's a 30% payout, it's $7.50.
Quite a gamble, but don't expect results for over a year.