The Fed had a good graph on the sky high amount of debts many companies are laying on, but I'm having a hard time finding it right now. A bunch of outlets have written on it, here is the first one I found http://money.cnn.com/2018/02/26/investing/corporate-debt-ris...

As to how many will fail is anyone's guess. Retail has already started to have a reaping (with help from Amazon). If a trade war kicks off price increases for goods from China, that probably won't help a lot of them.

Sub-prime auto market is not doing well either, that should hurt auto manufacturer numbers, but nothing crazy there at the moment.

I think everyone is still trying to guess.