4 reasons why I think the Diageo share price could rise More on: There’s some momentum behind the Diageo(LSE: DGE) share price. As I write, the stock is up over 8% in the past month and more than 18% in the last year. Of course, there is no guarantee this will continue. But I think the stock could rise further. And here are four reasons why I’d buy. #1 – Diversified portfolio Don’t put all of your eggs in one basket. I think this is a great piece of advice when its comes to investing. The same applies to firms such as Diageo.