penny stocks10 Top Marijuana Penny Stocks of 2017 Show Returns as High as 7,150% August 1, 2017 by Alex McGuire Our list of top marijuana penny stocks of 2017 shows companies with triple- and quadruple-digit returns. The top performer has even seen gains as high as 7,150%. Here's our full list - plus, we'll show you how you can make an incredible windfall from Canada's upcoming legalization...