Your simple rule-based investment with Exchange Traded Funds. ETFs are a more affordable alternative to actively managed funds and have been gaining popularity for years. Not only due to their low costs and high transparency, but they are also becoming increasingly attractive for you as a private investor and for companies. However, the same principle applies to ETFs: those who trade based on emotions will lose. Therefore, simple rules are needed to ensure that investing in ETFs yields optimal returns. This guide introduces rule-based investing in an easily understandable way. Rule-based investment strategies are based on empirical values and fundamentally differ from traditional strategies that aim to predict future price developments. As an investor, you define the rules before the initial investment and implement them consistently. This prevents emotional trading.