The Banks Do Not Want to Hold On to Cash! Fed’s Reverse Repo Hits Record $992 Billion, Up $150 Billion In One Day

https://www.zerohedge.com/markets/do-we-hear-trillion-feds-reverse-repo-hits-record-992-billion-150-billion-one-day 

So they “lend” the fed the money overnight while the Fed gives them collateral 9Treasuries) overnight and 0.05% for the use of that overnight money.