[mikeyouse]

That's a slightly different thing - a reserve account is what you've correctly linked, but what people here are talking about is just a basic balance sheet categories of cash and marketable securities;

https://d18rn0p25nwr6d.cloudfront.net/CIK-0000320193/386e8c0...

So they have $25 billion in cash/cash equivalents (T-bills), $31 billion in "Current Marketable Securities" which are just those that are liquid this year so short-term debt and the like, and then $110 billion in long-term marketable securities which can be medium term bonds and other investments on a >1 year timeline.

Add those up and you get to $166 billion which is a good proxy for the amount of money they can invest today.

[inkyoto]

Thank you for the clarification. Wikipedia links both, «cash reserves» and the accounting style reserves definitions, into a single article, which I have found somewhat puzzling. A subsection in the same article outlining or expanding on the difference between the two would be beneficial.