Mutual Funds. AAA, AA, credit rating, bond credit rating, bond rating, creditworthiness, investment grade, speculative grade, retirement plan sponsor, investment objectives, mark-to-market, net asset value, NAV, open-end mutual fund, closed-end investment company, fund redemption, ETF, load fund, sales fee, management fee, annual fee, no-load fund, back-end fund, deferred sales charges, 12-b1 fees, fund supermarket,