Trim the angels’ share

Put your money into the wrong fund and you may come back to find your wealth has evaporated, says Merryn Somerset Webb.

If you age your whisky, beer or wine in wooden barrels, you generally have to be prepared to lose some of it along the way. Non-air-tight containers and evaporation mean that over time, barrels (and wine bottles with natural corks) end up with air between the liquid and the top of the container. The missing liquid is known as the 'angels' share' and the remaining space as the ullage (from the French ouillage).

There is a balance to be found here. Winemakers know that they need to share a little with the angels some oxygen is needed to break down tannins and so on but they don't want to overshare: too much and the wine will be ruined.

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Merryn Somerset Webb
Former editor in chief, MoneyWeek