Sending cash to money market funds was a popular endeavor during the week ended Jan. 10, according to the latest data from

Investment Company Institute

(ICI). From Jan. 3 to Jan. 10, investors stuffed some $67.7 billion -- the largest one-week increase in three years -- into money market funds, which brings the total residing in money market funds to an all-time high of $1.936 trillion.

Money Market Balances

Source: Investment Company Institute