Mass migrationIt seems that funds are leaving small stocks in healthcare for bigger ones. Valeant, came back from the dead and is drawing a lot of funds; it went from 19.00 to 29 dollars in a couple of weeks. So i gather funds also leaving CRH plus tax-loss selling cause the stock price to plummet again. Any hope to the upside, can only be expected in 2018 and if the earnings are decent.Buy-backs don't seem to have any impact on the sp so far unless the buying is massive and i don't know if the TSX allows it or it sets certain quotas to buy for each month. In any case, it will eventually affect to P/E ratio and the price of the stock.