Thanks for sharing the link, Ryan!
I ran into a similar scenario attempting to short MLNT today. DAS Pro showed the equity as "Marginable by default". The margin order I placed was rejected due to IB showing the stock as non-marginable. (E.g. I didn't meet the initial margin requirement of 100% trade value in my IB acct.)
Wondering if anyone has run into this issue before and is there a way, within DAS, to get a more accurate view of IB's margin requirements on any given stock?
The website you shared, Ryan, is helpful, but not a quick-to-execute option.