Behind the drop were figures from the Conference Board, the independent research group, suggesting that consumers' expectations are darkening. The board's reading on consumer confidence rose to 109.8 in May, in line with forecasts, but the survey's expectations index fell to 109.4 from 109.6 in April. 'The latest retreat in expectations suggests that the pace of economic growth will not accelerate in the months ahead,' said Lynn Franco, director of the board's consumer research centre.