New York City remains home to roughly double the number of hedge-fund managers as London, but the two centres increasingly stand head and shoulders above the rest of the world.

ECONOMIST: Hedge funds

This is apparent in the way that investors have continued to move into gold as a hedge against another possible double dip in markets in the next months.

FORBES: Let's Talk About Correlation

Ever-innovative financiers have given hedge funds new tools to double up their bets.

ECONOMIST: The credit squeeze