(Reuters) - Investment flows into U.S. money market funds surged to the highest in over a year in the week to May 26, on caution as investors awaited U.S. data expected to offer clues on inflation. Refinitiv Lipper data showed U.S. money market funds drew in a net $66.6 billion in the week, the biggest amount since April 2020, with investors concerned about a rise in inflation levels and the impact on the direction of U.S. monetary policy. Meanwhile, U.S. equity funds attracted a net $5.06 billion, as stocks rallied somewhat after U.S. Federal Reserve officials reaffirmed a dovish monetary policy stance. Graphic - Fund flows into U.S. equities bonds and money market: Among equities, investors purchased value funds worth $2.4 billion, while growth funds faced outflows worth $859 million. U.S. bond funds saw net purchases of $4.82 billion, the highest in three weeks. Investors bought $2.35 billion in U.S. taxable funds and $1.31 billion in municipal bond funds. Graphic - Flows into U.S. equity sector funds: Graphic - Fund flows into U.S. growth and value funds: U.S. inflation-protection funds also had an inflow of $641 million, which was their fourth successive inflow. Graphic - Flows into U.S. bond funds: