Reason for Costa's sky rocketing SP??

Anyone have any thoughts why CGC is doing so well? Latest report shows Revenue, EBITDA and NPAT all up during 1H FY 2017 but CGC's SP has been increasing steadily since beginning Dec 2016. Don't get me wrong, I'm happy but am curious if someone sees what I don't. Nothing drastic is happening in the food sector. CGC is a great company but there has been no major strategy changes in the past year. Number on paper are great. Is it that people are finally seeing CGC potential? FWIW I still think CGC is overvalued at the moment.