Investment income refers to the profits or gains that individuals or businesses generate from their investments. In the context of trading or investing, investment income can be earned through various financial instruments such as stocks, bonds, mutual funds, real estate, or even cryptocurrency.

When it comes to trading or investing, there are several ways to generate investment income. One common method is through capital appreciation, where an investor buys an asset at a certain price and sells it later at a higher price, thereby earning a profit. This typically occurs in the stock market or real estate market, where the value of assets can increase over time.

Another way of earning investment income is through dividends or interest. Dividends are a portion of a company's profits that are distributed to its shareholders. Investors who own stocks or mutual funds that pay dividends can earn a regular income stream from these payouts. Similarly, bonds pay interest to investors who lend money to a company or government entity, providing a fixed income stream. These dividends and interest payments can contribute to an investor's overall investment income.

In addition to capital appreciation, dividends, and interest, investors can also earn investment income through rental income. Real estate investors can generate a steady stream of income by renting out their properties to tenants. This rental income can help offset expenses and provide a passive income source.

It's important to note that investment income can be subject to taxes. The tax treatment of different types of investment income can vary, so it's advisable to consult a tax professional or accountant to understand the specific tax obligations related to your investments.

In conclusion, investment income refers to the profits or gains earned from various investments such as stocks, bonds, real estate, or other financial instruments. It can be generated through capital appreciation, dividends, interest, or rental income. Understanding how investment income is earned can help individuals and businesses make informed decisions when it comes to trading or investing.