What is an index fund and why do beginners like it?

An index fund is a type of investment fund that tracks a market index, like the S&P 500, by holding the same stocks in the same proportions as that index. Instead of a manager picking individual stocks, the fund simply mirrors the index automatically. Beginners like index funds for several reasons. They offer instant diversification since you own small pieces of hundreds of companies at once, reducing the risk of any single stock tanking your investment. They also have very low fees because there's no active management involved. Historically, most actively managed funds fail to beat index funds over the long term, so beginners get solid returns without needing expertise in stock picking or market timing.