That’s the GDP of a smaller, developing nation. There are many hedge funds that manage less than that.

Amazon’s whole HQ2 competition took the US by storm and indirectly led to tons of speculative real estate investment all over the country, yet it involved much less than $26 billion...

Yes, such a sum will likely not have a noticeable effect on the US stock market as a whole, but that doesn’t mean it’s a sum that can be invested as easily as many seem to assume.

It's usually wrong to compare fixed amounts of money (units of $) with GDP (units of $/year), "stocks vs flows". As far as I know, Amazon's HQ2 was much more to do with public relations and lobbying than anything to do with money, and I believe "took the US by storm" is a great exaggeration of the actual events, so I don't find what you're saying convincing. As others have pointed out, pension funds noticeably don't have a problem investing large amounts of money despite being in a similar situation. All the aspects you seem to be worried about are routinely handled in the financial markets.

I understand the difference. I was just using GDP to demonstrate that the amount of money we’re talking about could run a country’s entire economy for a year.

The competition for HQ2 was fierce across the US. States and cities were bending over backwards to meet Amazon’s demands. Any whiff of activity or rumor was covered by both national and regional news. Real estate investors were buying up land in virtually every state. All of this for a potential economic benefit much lower than this $26 billion we’ve been talking about. It was a nationwide frenzy.

Again, the point is that investing $26 billion can have an effect depending on how it is invested, not that it will definitely have an effect.

I'd certainly notice the lump sum of $26 billion in my bank account.