Standard & Poor’s has bestowed on two new money market funds its highest money market rating, AAAm. The AARP Money Market Fund and the Goldman Sachs Yen Liquid Reserves Fund are the latest in a series of money market funds to receive this rating.

The Goldman Sachs Yen Liquid Reserves Fund was launched May 1 and is the first yen-denominated fund that S&P has rated. The fund will invest in typical money-market instruments that are yen-denominated, with a 60-day or less weighted average maturity. The fund is part of a group of rated U.S. dollar, euro, and British pound money market and short-term subfunds from Goldman Sachs Funds, PLC, which is registered in Dublin.

The AARP Money Market Fund was launched by AARP Financial on April 30, and rather than buying money market instruments themselves, this fund will invest through a “master-feeder structure” in shares of the State Street Money Market Portfolio, which has itself been AAAm rated since July 2005, according to an announcement from S&P. The fund is sub-advised by SSgA Funds Management Inc. Tewksbury, Massachusetts-based AARP Financial offers five, life stage AARP Funds as well.