ICI's latest monthly "Money Market Fund Holdings" summary, which reviews the aggregate daily and weekly liquid assets, regional exposure, and maturities (WAM and WAL) for Prime and Government money market funds, tells us, "The Investment Company Institute (ICI) reports that, as of the final Friday in December, prime money market funds held 42.6 percent of their portfolios in daily liquid assets and 58.1 percent in weekly liquid assets, while government money market funds held 77.5 percent of their portfolios in daily liquid assets and 88.0 percent in weekly liquid assets." Prime DLA was up from 41.3% in November, and Prime WLA was down from 58.7%. Govt MMFs' DLA fell from 77.6% and Govt WLA increased from 87.7% the previous month. ICI explains, "At the end of December, prime funds had a weighted average maturity (WAM) of 29 days and a weighted average life (WAL) of 50 days. Average WAMs and WALs are asset-weighted. Government money market funds had a WAM of 38 days and a WAL of 91 days." Prime WAMs were 3 days shorter and WALs were 4 days shorter from the previous month. Govt WAMs were 1 day shorter and WALs were unchanged from November. Regarding Holdings by Region of Issuer, the release tells us, "Prime money market funds' holdings attributable to the Americas rose from $514.72 billion in November to $632.02 billion in December. Government money market funds' holdings attributable to the Americas rose from $5,061.10 billion in November to $5,277.26 billion in December." The Prime Money Market Funds by Region of Issuer table shows Americas-related holdings at $632.0 billion, or 59.4%; Asia and Pacific at $206.5 billion, or 19.4%; Europe at $204.2 billion, or 19.2%; and, Other (including Supranational) at $22.2 billion, or 2.2%. The Government Money Market Funds by Region of Issuer table shows Americas at $5.277 trillion, or 92.9%; Asia and Pacific at $121.1 billion, or 2.1%; Europe at $263.1 billion, 4.6%, and Other (Including Supranational) at $19.2 billion, or 0.3%.