Hedge funds are borrowing more to buy equities just as loans by New York Stock Exchange brokers reach the highest in four years, signs of increasing confidence after professional investors trailed the market since 2008.

Leverage among managers who speculate on rising and falling shares climbed to the highest level to start any year since at least 2004, according to data compiled by Morgan Stanley. Margin debt at NYSE firms rose in November to the most since February 2008, data from NYSE Euronext show.