Which came first, the chicken or the egg, more importantly why does it matter. We are in "uncharted territory" here. Never before has our government expected a company to submit to a NET WORTH SWIPE of all profits, past present and future. It's beyond unconscionable, and fixing this mess presents new challenges for the administration. However, they do have a plan. And, its working, tho we are not privy to all the details, just like we don't know which stock is the next Stock, "whoever" is taking over Berkshire Hathaway, or Buffet, will buy. It's a carefully guarded secret, we won't know until the 13f filing. Buffet has admitted to his mistake of not buying fnma. Further, as we learned from Ackman, he is not required to file a 13f on OTC stocks, so Buffet isn't likely either. No one knows, except perhaps some Berkshire insiders, if this massive volume is Buffet buying. Frankly it does not matter. Whoever is buying it, is either a super large investor or massive numbers of small investors, or even both of these. Or, multiple large investors.
I decided not to "guess" at an answer to your question. As Ackman says, "let the market speak", and the market says "BUY".