In this part of the holiday season, this publication re-issues a few of those features that it thinks readers will enjoy dipping into again. 

As this feature article showed, a variety of forces have encouraged large inflows into money market funds, for example in the US. We talked to Aviva Investors, which runs a series of funds in the sector, about what's driving growth and why potential for expansion remains high. The sector is not without its risks and challenges, however.