In this sense, must does not form a negative. Must is a modal verb. The charles schwab corporation provides a full range of brokerage, banking and financial advisory services through its operating … Used as an auxiliary to express obligation or compulsion: Open a schwab brokerage account and invest in financial products like stocks and mutual funds. How to use must in a sentence. You use must to indicate that you think it is very important or necessary for … It is followed by the base form of a verb. A brokerage account is an investment account that allows you to buy and sell a variety of investments, such as stocks, bonds, mutual … Charles schwab bank, member fdic a checking account built for investors schwab bank investor checking™: Checking and cash … The meaning of must is be commanded or requested to. Charles schwab offers a wide range of investment advice, products & services, including brokerage & retirement accounts, … When youre taking kayaking lessons, a lifejacket is a must. You must pay your dues. You can manage your brokerage account with … We usually use must to talk about obligations which come from the speaker and we generally use have (got) to when we refer to obligations … A must is something thats so important it cant be missed or ignored.