A press release entitled, "Moody's assigns a Aaa-mf rating to the UBS (Irl) Select Money Market Fund - US Treasury fund" tells us, "Moody's Investors Service, ("Moody's") assigned a Aaa-mf rating to the UBS (Irl) Select Money Market Fund - US Treasury. The money market fund seeks to earn maximum current income in US Dollar terms consistent with its objectives of liquidity and capital preservation. UBS Asset Management (Americas) Inc serves as investment adviser to the Fund." Moody's explains, "The Aaa-mf rating reflects the Fund's high scores across key rating factors including asset quality, fund liquidity and resilience to market risks. The Fund's credit quality is strong as it is primarily invested in US treasury debt and repurchase agreements collateralized by the same. Given the investment objective of the fund, we expect credit quality to remain strong. The Fund's ability to provide liquidity is also very strong and is demonstrated by the high level of overnight liquidity of 100%." They add, "The Fund limits its interest rate and spread risks by keeping its weighted average maturity (WAM) below 60 days. As of 31 January 2019, the Fund's WAM was 37 days and it exhibited very low exposure to market risk. UBS Asset Management is a leading global investment adviser with assets under management totaling $781 billion as of 31 December 2018."