Actually, Schwab had listed my NWBO shares in my account under Non marginable and Marginable. There was a little plus sign next to "NWBO" that when you clicked on it, down dropped the designations described above. I posted about this a couple of months ago as well.
This is what it looked like.
I had those shares in a margin account, but had not been using margin for over a year.
The number in the "marginable" designation grew larger as time went by. Initially there were maybe 80% in the Non Marginable designation, and 20% under the Marginable designation. And it displayed like this in all three margin accounts I held shares in at the time.
By the time I finally moved those shares into a cash account (before Jan 9), the percentages had switched.
I didn't move them into a cash account right away because I wanted to see if the numbers changed. And they did, over time. It became boring watching to see if it would change so I stopped looking as it wasn't changing. And then a month or so went by, and as I said, the numbers had changed dramatically by the time I moved the shares to the cash account. And now, that plus sign is gone.
I initially asked CS about these designations, and no one could explain what it meant there. I talked to the first person who answered, their manager, and then someone in the shorting department. But they all promised me my shares weren't being shorted. And frankly, I believe that this is what they believe. But the fact that they can't even explain why the designations are like that is odd. And I'll add that the persons I spoke with had never seen other shares divided up like that.