NOTES TO FINANCIAL STATEMENTS NOTE 2. DEPOSITS AND INVESTMENTS (CONTINUED) Retirement Plan for Employees of Georgia Ports Authority (Continued) Concentration of Credit Risk: Concentration of credit risk is the risk of loss that may be attributed to the magnitude of a government’s investment in a single issue. At June 30, 2021 and 2020, the Plan holds more than 5% of its investments in the following mutual funds and exchange traded funds: Investment Exchange traded funds Ishares Core S&P 500 ETF Ishares Russell 1000 Growth ETF Ishares Core S&P U.S. Value ETF Ishares Core MSCI EAFE ETF Invesco S&P 500 Pure Value ETF Ishares Core MSCI Emerging Markets ETF Vanguard Russell 1000 Value ETF $ Mutual funds Ishares Core I.S. Aggregate Bond ETF $ $ 2021 57,510 - - 27,456 33,962 58,543 104,296 281,767 105,542 $ $ $ 2020 40,498 114,258 34,241 20,964 - - - 209,961 95,210 Foreign Currency Risk: At June 30, 2021 and 2020, the Plan assets had no exposure to foreign currency risk. Retiree Medical and Dental Plan Deposits and investments for the retiree medical and dental plan (OPEB Plan) are summarized as follows: Demand deposits 2021 $ Mutual funds Exchange traded funds $ 376 $ 10,932 7,270 18,578 $ 2020 641 8,883 5,165 14,689 At June 30, 2021 and 2020, the fair value of the OPEB Plan's cash and investments was $18,578 and $14,689, respectively, of which $376 and $641, respectively, is classified as cash equivalents due to the short-term nature of the investments. As of June 30, 2021 and 2020, $18,202 and $14,048, respectively, is classified as assets measured at fair value (mutual funds and exchange traded funds). 31