Why Aurora Cannabis, OrganiGram, and Others Dropped Today

Stocks in the cannabis sector both large and small are taking a hit today. As of 1:30 p.m. EST, these four stocks are moving in tandem:

Those stocks have a large range in market capitalization of $5 billion, $1.5 billion, $465 million, and $310 million, respectively.

There's no apparent company-specific news today, but something is likely driving market sentiment.