Founded in 1946, Fidelity Investments of Boston is one of America's largest managers of mutual funds and exchange-traded funds (ETFs). Retirees looking for ETFs with low management fees have a lot of options at Fidelity. Here are 10 ETFs with the lowest expense ratios at the company. No. 10: Fidelity MSCI Financials Index ETF (FNCL) This ETF invests in financial institutions, seeking to track the MSCI USA IMI Financials Index. Top holdings include JP Morgan Chase, Mastercard and Visa.