fixed interest and debt securities (where you lend your money to someone else to use in return for interest paid to you); and
equity
securities (where you buy shares in a company and may be paid a
dividend by the company and have the chance of making a capital gain if
you sell your shares at a higher price than you paid for them); and
managed funds (a fund of money paid in by several people which is managed by a fund manager).
Compare Credit Cards - Independent interest rate and fees comparisons for New Zealand banks.