I have our accounts at Schwab, and yes, we do it electronically. There must be, within Ameritrade, a way to search for a symbol. If is, then as before, do a search for TMA ... and it, along with related pfd's, will pop up.
What I did with AHM and ENRON was, during the final days prior to bk, bought on down days with the various issues, stock and/or pfd's, and watched diligently for it to go up next day, and dumped it quickly. With AHM a couple of weeks ago, got almost a 60% kick.
I've done a bunch more in the past. Recall Continental Airlines for one; few days after 9-11.
Others also but can't recall them all now some years later.
The pfd's site I referred to ... www.quantumonline.com Has a good reference listing of many many pfd's. I use it all the time since we are in fixed income bracket for our retirement. doon