USA Intraday Liquidity Flow

The study provides a view of the infrastructure that enabled approximately $14.8 trillion of USD denominated payments and the associated $7.1 trillion of cash needed to settle those payments to move through the financial system in 2014.

        https://www.newyorkfed.org/medialibrary/microsites/prc/files/PRC-Intraday-Liquidity-Flows-Report.pdf

During December 2014, aggregate overnight balances held in Federal Reserve accounts averaged over $2.6 trillion. If a bank does not have sufficient ready cash and it has been granted access to daylight overdrafts at its Federal Reserve Bank, it can use daylight overdrafts to support the transaction. During the fourth quarter of 2014, daylight overdrafts incurred by depository institutions averaged about $1.3 billion in aggregate.