You can sell a non-Fidelity fund and buy a Fidelity fund with the proceeds. This type of transaction is called a cross family trade, where you sell mutual fund assets in one mutual fund family to purchase mutual fund assets in a different fund family. The settlement date for the sale portion of the transaction is one business day later than the trade date. Therefore, the purchase takes place on the next business day following the sale. On the sale of your mutual funds, you will receive the next available price, and on the purchase of your mutual funds, you will receive the next business day's price.