Last minute spikeLast minutes spike in the price of CRH is likely the shorts covering and the price depressed back down by the market makers who seize the opportunity to unload their stocks when they bought them during the short covering. The positive thing is that the shorts are not so sure the stock will go lower so they started covering you know what. As the short covering will likely continune, we can expect some sharp moves in both directions. The stock's volume is also higher than other days in the US which is evident the US traders have been shorting most health care stock in Canada and the US.