Government security prices slid across the board as the cutoff rate on the 11-year paper, 6.78 per cent 2015, was set higher at 6.98 per cent.Prices of long-term gilts crashed by Rs 3, while those of medium-term securities dipped by Rs 1.50.The yield on the ten-year benchmark paper, 7.37 per cent 2014, closed higher at 6.92 per cent.Call money rates remained comfortable.Repo outstanding stood at t Rs 13,000 crore.