A timber investment should be a useful addition to any well-diversified portfolio.

Mini-bonds can be a useful part of a well-diversified portfolio.

As part of a well-diversified portfolio, private equity can add a spark.

It's sensible to build a well-diversified portfolio of shares rather than buying just a handful.

To ensure that you have a well-diversified portfolio — one invested in a range of private-equity firms and other assets to reduce risk — you should have at least 500,000 to invest.