⏳ Reading Time: 5 minutesIn recent years, index funds have gained popularity among investors in the UK. These are passive investment vehicles that track the performance of a market index, such as the FTSE 100 or the S&P 500. Index funds offer a simple and efficient solution for those who want to diversify their portfolio without high costs.
In thiscomprehensive guide for 2026, we will look at what index funds are, how they work, what advantages and disadvantages they offer, and who they are best suited for. We will also provide some practical tips on how to integrate index funds into a long-term investment strategy.
What are index funds?
An index fund is a mutual fund or ETF (Exchange-Traded Fund), which is a passively managed financial instrument that replicates the performance of a benchmark index. This means that the fund manager does not actively select securities, but simply buys the same assets in the index, in the same proportions.
To give a concrete example, a fund that tracks the FTSE 100 holds shares in the 100 leading companies listed in London. This approach significantly reduces management costs, as no active selection or in-depth analysis is required.
