ETFs are becoming increasingly popular among investors who wish to take a longer-term view on a particular index or sector. That’s because ETFs offer a low cost, efficient way to gain market exposure. Moreover, as we noted earlier an index tracking ETF such as ISF (the IShares FTSE 100 ETF) only tries to mirror the performance of the underlying index rather than outperform it, which is much harder to achieve. Investors can hold ETFs on the FTSE 100 within stocks and shares ISAs and self-invested pension plans or SIPPS as they are known. However, as with any investment strategy, it’s important to assess your risk concentration and individual requirements in terms of income versus capital growth and to seek professional advice.