The harm done by housing and construction booms in Ireland and Spain should be a caution to would-be members who, once inside, may get carried away by low borrowing costs.

ECONOMIST: The gains outweigh the losses

But Young refused to get carried away and said now all the region's attentions would be concentrated on getting a result against Bath next week and making it into the EDF semi-finals.

BBC: Halfpenny is compared to Williams

Yes, since they can be bought and sold throughout the trading day, unlike traditional mutual funds, investors can get carried away with them.

FORBES: Surfin' ETFs