October was definitely not a good time for stocks in the marijuana industry. But the combination of a broader market correction and a "sell the news" mentality after cannabis became legal in Canada led to dramatic declines. All four stocks ended the month down by roughly a quarter to a third.
However, it can be more informative to look at stock performance over the course of a typical cycle of upward and downward stock movements. Three months is hardly enough to be considered a true market cycle, but it does give a good sense of how abrupt rises and falls of a market often work out in typical corrections.
EXCERPT FROM THE MOTEY FOOL