The benefit of using something like an index fund is that you’re saying, “I don’t care what the top 10 biggest companies are, I just want shares of the top 10 biggest companies at any given time.”
The benefit of using something like an index fund is that you’re saying, “I don’t care what the top 10 biggest companies are, I just want shares of the top 10 biggest companies at any given time.” Just like above, as those companies change on the index, so too does what you own.