Marijuana stocks took a nose dive in the early trading, a day before legalization in Canada.

Most of the pot stocks saw an up-tick at the open, but quickly fell afterward, causing some them to see some volatility-halts. However, several of these shares are now inching back, after the sudden drop.

Pot giant Canopy Growth Corp. fell as much as 10.1 per cent in Canadian trading. Organigram Holdings Inc., Tilray Inc. are also among the companies that dipped around the same time. Namaste Technologies and Aurora Cannabis dropped more than 9 per cent and saw volatility-halts in trading. Most of these cannabis stocks reached near record highs yesterday, and the selloffs could be tied to algorithms related to all-time high prices.

Marijuana ETFs such as ETFMG Alternative Harvest and Horizons Marijuana Life Sciences Index ETF also tumbled more than 4 per cent today.

Cannabis Canada is BNN Bloomberg’s in-depth series exploring the stunning formation of the entirely new – and controversial – Canadian recreational marijuana industry. Read more from the special series here and subscribe to our Cannabis Canada newsletter to have the latest marijuana news delivered directly to your inbox every day