Hedge funds are major players in the international financial system and nimble investment strategies including the use of leverage allow them to build up large positions. Yet the monitoring of systemic risks posed by the build-up of leverage is hampered by incomplete information on hedge funds'...

Style analysis shows that as market conditions change so do the investment strategies of hedge funds. It also provides a simple indicator of hedge fund leverage that varies over time. The indicator suggests that leverage tended to be high in 1997-98 but lower more recently.