Year-end level from annual financial statements compiled by and purchased from SNL Financial. Staff tabulation of money market mutual fund shares from Schedule DA--Part 1, book/adjusted carrying value, sum of line Subtotal - exempt money market mutual funds and line Subtotal - class one money market mutual funds. Levels for other quarters estimated from staff tabulation of quarterly statement, Schedule DA--Part 1, percentage of total short-term investments. Percentage used is FOF Section estimate based on distribution of annual short-term investment data. Unadjusted flow is the change in the level; data for the most recent ten years show no significant seasonality.