Money market mutual funds have experienced significant inflows, with an additional $21 billion added this week, bringing the total assets under management to a record high of $6.26 trillion. This marks the fourth consecutive week of inflows, totaling over $125 billion for the month. The increase in money market fund assets coincides with a substantial $85 billion drawdown in bank deposits, the largest weekly decline since May. The movement of funds into money market mutual funds is attributed to increased T-bill issuances and a shift of money out of sterilization.