Closed-end funds are a type of investment fund and exchange-traded product (ETP). They are structured as publicly traded investment companies by the Securities and Exchange Commission (SEC). Closed-end funds raise a prescribed amount of capital only once, through an initial public offering (IPO), and list shares for trade on a stock exchange. Unlike open-end funds (mutual funds), closed-end funds do not stand ready to issue and redeem shares on a continuous basis. Instead, the shares can be purchased and sold only in the market. This is the reason why MZJ Income Fund, which does not issue new shares and its shares can only be bought or sold like equity on exchange markets, is a closed-end fund.

Choice B is incorrect. An open-end fund continuously issues and redeems units or shares based on the net asset value (NAV) of the fund. This is not consistent with MZJ Income Fund's structure, which does not issue new shares.

Choice C is incorrect. While exchange-traded funds (ETFs) are traded on exchanges like equities, they also create and redeem shares based on demand, unlike MZJ Income Fund which does not issue new shares.

Choice D is incorrect. Hedge funds are typically private investment vehicles that have limited liquidity and do not trade their shares publicly on exchange markets as described for MZJ Income Fund.