The months of May and June have already shown a great amount of positive gains for many leading marijuana stocks. As we continue to traverse into the summer, it looks like these cannabis stock gains are becoming more and more consistent. There are several reasons as to why the cannabis industry is showing so much upward propensity right now. For one, the cannabis industry has recorded more percentage gains and on a more consistent basis than most other areas of the stock market. This has been one of the main reasons that so many investors are attracted to the cannabis industry.