Fannie Mae-No Politics (FNMA)

[QMtrader]

Hi. It looks like JPM Chase has just stopped allowing clients to buy FNMA/FMCC. I know Robinhood and Vanguard did that a couple years ago. These bans add downward pressure to the stocks. Does anyone know what causes these decisions?
Also, thanks to everyone sharing information and views and also those people doing something to spread awareness of FNMA/FMCC- Navycmdr, Guido, Bradford, Ace Trader, KThompson, Wise Man, etc.. The information and open debate is really helpful. I have a couple other questions if anyone on the board has answers -
1. At what point do short traders have to put aside money to pay their share of the Lamberth ruling? FNMA already put it on their annual report, but I wonder if/when others have to do it and how much it would be.
2. What happens if the government is found to have actually nationalized FnF? Wouldn't the $8 trillion FnF debt have to show up on the federal debt and cause the US gov credit rating to go down and interest rates to go up? Are fed bondholders also getting a raw deal by having this debt kept off the fed books?
Thanks again.