Categories like small caps, emerging-markets stocks, and junk bonds capture a lot of attention, but they're small fry in the scheme of things.
While many rival funds are venturing into lower-quality credits, these funds have been downplaying them.
Equities popped after Prime Minister Cameron retained power, but valuations may be getting overstuffed, writes Morningstar U.K.'s Emma Wall.
UPDATE: It's time to dispel the myth of the summer rally in stocks
Why they're attractive, the four variations, and why investors should take a strategic rather than a tactical approach with these funds.
IndexIQ Announces May 2015 M&A Deal Holdings in IQ Merger Arbitrage ETF (Ticker: MNA)
But for investors, frontier-markets funds have short track records and carry unique risks.