An open end mutual fund don’t have limits on the quantity of shares the fund will issue. Provided that demand is requested often, the fund will continue to issue shares no matter the number of investors. Open-end funds likewise will purchase back shares when investors would like to sell.
The large amount of mutual funds are open-end. By constantly buying and selling back fund shares, the funds will provide investors with a useful and convenient investing tool.
Please note that when a fund’s investment manager decides that a fund’s total assets are becoming too large to adequately accomplish its stated objective, the fund will be cut off to new investors and in extreme cases, be shut off to new investment by existing fund investors.