Japan's Nikkei has soared while the yen has tumbled against the dollar, amid speculation the government is considering a corporate tax cut.
US markets could be heading for a 1987-style crash, according to Swiss investor Marc Faber.
The Nikkei tumbled 3% on Friday to touch its lowest level for almost three weeks as the yen strengthened against the dollar.
Morningstar has revealed the ten most popular exchange-traded funds (ETFs) in the second quarter of 2013, based on the most searched for funds on its website.
Investors must rethink their approach to categorising global markets, according to Luke Barrs of Goldman Sachs Asset Management.
The US market has risen in early trading as investors' positive mood continues following the US jobs report released late last week.