1.  mutual fund(n = noun.possession) Array - the pooled money that is invested in assets; Array
is a kind of fund, monetary fund
has particulars: etf, exchange traded fund, index fund

2.  mutual fund(n = noun.group) mutual fund company, open-end fund, open-end investment company - a regulated investment company with a pool of assets that regularly sells and redeems its shares; Array
is a kind of fund, investment company, investment firm, investment trust
has particulars: index fund

closed-end fund, coefficient of mutual induction, endowment fund, fund, fund raise, hedge fund, imprest fund, index fund, international monetary fund, monetary fund, mutual, mutual affection, mutual aid, mutual attraction, mutual company, mutual exclusiveness, mutual inductance, mutual induction, mutual opposition, mutual resemblance, mutual savings bank, mutual understanding, open-end fund, pension fund, reserve fund, retirement fund, revolving fund, sinking fund, slush fund, superannuation fund, trust fund, united nations children's fund