"Investment income" refers to the money you earn from your investments. It includes any profit, interest, dividends, or capital gains you make when you invest your money in things like stocks, bonds, real estate, or other assets. Full definition
For example, if you have $ 3,000 in margin interest but net investment income of only $ 1,000, you can only deduct the $ 1,000 in investment interest in the current year. (turbotax.intuit.com)
The government also recently introduced a number of income taxes, including a 1 % withholding tax on earnings of investments incomes of ordinary citizens. (ghanapoliticsonline.com)
If you invested that same $ 5,000 outside an RRSP, every year you'd be taxed on investment income earned by that capital. (business.financialpost.com)