I think given their history the market will give the management the benefit of the doubt. The company needs to always look at new opportunities and certainly through M&A that is how ACB has grown. I understand that Carrefour has a grocery aspect to it that is *new*. Now, certain market participants (i.e. tourists) may not want to sit around and go through operational integration of a large M&A nor do they want to stick around when the deal is being consummated.
That is all fine and well for me. As long-term owner, I am paying the annual salary of ACB's management and I trust they will figure it out. I would not be in the stock if I didn't like them. Of course, i can also chose to not add to the stock as the rest of portfolio grows and only add after one gets comfortable, but then you will be paying more.