Source: Board of Governors of the Federal Reserve System (US)  

Release: H.4.1 Factors Affecting Reserve Balances  

Units:  Billions of Dollars, Not Seasonally Adjusted

Frequency:  Weekly, Ending Wednesday

On November 24, 2008, the Money Market Investor Funding Facility (MMIFF) was created to provide funding to a series of limited liability companies to purchase short-term U.S. dollar-denominated certificates of deposit, bank notes, and outstanding asset-backed commercial paper.
For more information, visit http://www.federalreserve.gov/monetarypolicy/mmiff.htm.