Unlock stock picks and a broker-level newsfeed that powers Wall Street. Upgrade Now
The Under-the-Radar Reason Marijuana Stocks Are Plunging

In a little over two months, Canada is set to change the world. Following the passage of the Cannabis Act on June 19, Canada will become the first industrialized country in the world to legalize recreational marijuana. In the process, it'll open the door to perhaps $5 billion in added annual sales, atop what the industry is already generating from domestic medical weed and exports to foreign countries where medicinal cannabis has been given the green light.

For a few years leading up to this moment, marijuana stocks have seemed, at times, unstoppable. Investors who had the wherewithal to stick with pot stocks for extended periods of time since mid-decade have seen triple- or even quadruple-digit returns.

Jars filled with trimmed cannabis buds on a counter.
Jars filled with trimmed cannabis buds on a counter.

Image source: Getty Images.

The surface-scratching reasons pot stocks are plummeting

However, that's not been the case over the last six-and-a-half months. Over that time, the North American Marijuana Index, which tracks dozens of the most influential cannabis companies, has dropped by more than a third, from peak to trough. Considering that the revenue floodgates are about to open, this move lower appears to make little sense.

So, what gives? On the surface, there are a number of issues that could be to blame.

To begin with, we could blame Wall Street and retail investors for overhyping the industry. Anytime a new technology or product has come along that has serious growth potential, investors almost always overhype it and push valuations into the stratosphere. Examples include the advent of the internet, business-to-business commerce, decoding the human genome, 3D printing, and even blockchain technology. The cannabis industry will take time to mature, and this is a point that may have gone over the heads of industry enthusiasts.

Another issue might be the unknown supply and-demand outlook. Since there is no precedent to an industrialized country legalizing adult-use weed, no one has any concrete idea how much cannabis will be demanded or produced. Initially, it's expected that demand will outpace supply, which would be a good thing for per-gram dried cannabis prices, and therefore margins. But things could get trickier by 2020, when capacity expansion projects for nearly all growers are fully operational. By then, domestic oversupply could be unavoidable, and it's unclear if exports would be able to handle such a large amount of oversupply.

Even competition could be to blame. Roughly six months ago, the aggregate production capacity of all major marijuana players might have reached around 1 million kilograms annually, when at full capacity. At the rate the industry is proceeding, we could be looking at 3 million kilograms by 2020 or 2021. There's far more competition than investors realize, and that could wind up eating into margins and operating income.