When you purchase a stock, you purchasing ownership in a company. When you purchase a bond, you are loaning money to a company. You are a creditor to the company. They will pay interest over a certain amount of time, and return the principal amount loaned after the time period for the loan has ended.
A mutual fund is a pool of funds collected from investors for the purpose of investing in securities such as stocks and bonds that is managed by money managers. Mutual Funds have different objectives that they wish to achieve. Mutual Funds could have the objective of Growth, Growth and Income, Blended, Bond, or Money Market. Depending on the objective of the fund determines how the fund in managed. — www.investopedia.com
When someone turns 70 1/2, the IRS requires that individual to withdrawal a certain amount of money out of certain retirement accounts. This includes Traditional IRA, 403(b), 457(b), 401k, Simple IRA, and SEP IRA accounts. This is to ensure that the government gets tax revenue from tax-sheltered retirement accounts. — www.forbes.com