Funds' investment policies vary. Investment time and risk tolerance indicate which type of fund is suitable at any given time. Liquidity funds focus on investments in deposits and short-term bonds and bills. The investment period is usually short, or one week or longer. Bond funds focus on investing in bonds. The bonds can be indexed or non-indexed and with or without a Treasury guarantee, depending on which fund is chosen. Bond funds are suitable for those who want small price fluctuations and stable return options. The investment period is wide, or from 3 months. Mutual funds invest primarily in equities, but they can be both domestic and foreign. Mutual funds are suitable for long term investments, who can tolerate fluctuations and are willing to take some risk to increase return potential. The investment period is intended for a longer period, or 5 years or longer. Mixed funds focus on diversified portfolios where the risk is spread between several asset classes such as equities, bonds and deposits. Mixed funds are suitable for those who want to mix asset classes and choose a fund that has a certain weight of asset classes in the fund. Index funds own securities in the same proportions as they are in the benchmark index. The aim of these funds is to show the same return as changes in the index. They provide a diversified portfolio, reflect a cross-section of specific securities and operating costs are generally low.