Part of it is the daily Repo and Pomo markets (google) where the FED allocates temporary of permanent funds for the primary trading banks to support the stock market and/or treasury market.
Awesome information!  I've googled it and waded through some BS to be quite frank....so I got to this table...

https://www.trading.treasurypoint.com/research/fundlist.asp

Can you help me read this, or can anyone who knows how?

PS-Anyone know why its no auto linky?

It looks like secure sites don't work with autoformat. I suppose I've never tried to link with a secure site and autoformat before.

You can always use the html "a rel="nofollow" href=link" to do it.

The link is here.