Barron, and Rodney elsewhere in reply, thank you for looking into this. But I still do not reach the same legal conclusion.
To me, the key is that FNMA’s charter Act Section 303 states quite plainly that it covers “preferred stock”. Ergo, any effort to try and fit the senior preferred stock into a section other than 303 is problematic at best, and simply runs afoul of 303’s plain language at worst.
That said, I can see how Section 304(g)1(A) might cause wonderment. That section authorized UST to purchase “any (FNMA) obligations and other securities” —which refers firstly (clearly) to debt and secondly to non-debt. But so what? The purpose there is to grant “authority to Treasury”, as it says. So considering 303 and this paragraph’s purpose, it seems far-fetched to think that 304(g)1(A) pulls double-duty as a silent, implied authority mechanism for some but not all FNMA preferred stock.
Thus, since in my view the Sr Preferred do not fall under 304, they do not qualify as a regulated “product” under HERA.
I may be wrong but I think that’s how a lawyer would see it. That’s how I see it, anyway. But your approach is a novel one so I wish you the best with it. If no one files suit we will never know, so until that happens it’s worth less than cyber ink. Good luck.