ETFs (Exchange-Traded Funds) are a type of investment product that owns and manages an underlying basket of assets (equities, bonds, commodities, derivatives, etc.) and divides the ownership of those assets into individual shares.
When you buy shares of an ETF, you’re participating in the gains or losses of the underlying assets that are held within the ETF. If those assets overall increase in value, individual shares will typically rise as well, and investors will earn a profit. On the other hand, if the assets within the fund overall decrease in value, individual units will typically drop as well and investors will incur a loss.
Let's use an example:
Paul is looking to invest in the U.S financial sector as he’s confident that this sector will outperform the market, but he doesn’t want to commit to a single company. Furthermore, Paul isn’t interested in composing and managing his own portfolio of securities due to time and knowledge constraints.
Paul is looking for an investment that is diversified across a very specific sector, so he considers an ETF.
After researching professionally managed ETFs that focus on the financial-sector, Paul finds an ETF that consists of 50 stocks of different financial institutions operating in America. For the sake of simplicity, let’s say the overall performance of the ETF will be evenly tied to the performance of all 50 of those financial institutions. This gives Paul the exposure to the financial sector that he’s looking for with his desired level of diversification.
Because Paul’s selected ETF has shares of so many different companies in the financial industry, his investment is less likely to be exposed to swings than if he were to invest in a single company within that industry. This can be both a benefit and a drawback, depending on the circumstances: if the value of one of the companies instantly dropped to zero then an evenly-diversified stock would remain at 98% (assuming the other 49 remained the same), however if the value of one of the companies instantly doubled then the ETF would only be up to 102% (assuming the other 49 remained the same).
Regardless, if the overall performance of the financial sector climbs, then Paul will benefit, even if some of the individual financial institutions within the ETF are struggling.