The minimum investment required to open an account with Scottrade varies depending on the type of account being opened. For a standard brokerage account, there typically is no minimum deposit requirement. However, for retirement accounts such as an Individual Retirement Account, Scottrade may have specific minimum deposit requirements which can change. It is always a good idea to refer to the current information available on the Scottrade website to verify the latest details regarding account types and their associated minimum investment requirements. Furthermore, if one is interested in additional account features, it may also influence the minimum investment needed. Being informed about these requirements can help in making a decision that aligns with investment goals.