Computer-driven hedge funds proved again last month that having an autopilot at the controls has been a generally safer bet this year than being in one guided by human hands, as a slight gain left model-driven portfolios up 12.5% this year.

Model-driven funds made 1.4% last month, according to data provider Barclayhedge, outperforming all but two of the 14 different hedge fund investment strategies that the data provider monitors.