(ShareCast News) - British investment group BlueCrest AllBlue Fund cited volatile market conditions in Europe and Asia for a 1.2% drop in returns for the month of June.The fall in returns from May to June reduced year to date returns to 0.8%, while the rolling 12 month return was 3.2%. BlueCrest said a number of markets initially declined in June and a brief recovery was followed by further weaknesses at the end of the month.Equity markets were broadly lower and credit spreads wider, as government bond yields moved another step higher, the investment group said."Uncertainty was fuelled by the twists and turns of Greece's protracted negotiations with creditors as well as dramatic volatility in China's equity markets," it added.The investment group's BlueCrest Quantitative Equity and BlueCrest Mercantile funds made positive contributions, while Blue Trend led the funds poorer performers.