Caledonia Investments (LSE: CLDN) is one of the market's more esoteric investment trusts. Founded by the wealthy Cayzer family, which once owned one of the world's most powerful shipping conglomerates, the £3.1 billion fund now functions as a multi-asset growth and protection vehicle.Caledonia has been part of the MoneyWeek investment trust portfolio since 2013. We like its diverse approach and its aim of earning solid long-term returns of 3%-6% above inflation, while managing risk during