This month's biotech penny stocks to watch have gained over 35% in the last 30 days alone, with one gaining as much as 133%.
But there is a better biotech stock to buy right now that also allows you to invest in medical marijuana at the same time.
OPXA
Opexa Therapeutics
10 Penny Stock Gainers to Watch Closely in July 2017
The top penny stock gainers of the month have seen profits as high as 152.1%.
That's why we've compiled a list of the top 10 performers over the last three sessions.
Here's the list - plus, one of our newest small-cap stock recommendations...