Assuming your broker doesn't charge commissions for stock trades (online brokers typically don't), calculating the number of shares you can buy with a certain amount of money is easy. To help you ...

Learn what mutual fund classes are and understand the various types of shares. You'll also find out the pros and cons of each.

getting fewer shares for its money -- and leaving it with less cash in reserve when its business slows. Investors should also proceed carefully if the buyback appears motivated by management's ...