Hi Peter,
I just answered a question on Methanex yesterday - thoughts haven't changed, it is a very volatile and difficult investment:
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Methanex is a very difficult one to consider a long-term investment because it is highly susceptible to the price of Methanol. If you look at its 10-year chart, you will see how volatile this stock can be. The recent surge is because Methanol was trading at near 10-year average highs due to short-term supply constraints. The expectation is that the price will normalize as disrupted capacity comes back online. Also worth noting, there are two large methanol plants (CGCL in Trinidad and YCI Methanol One in the U.S.) expected to start operation this year.
Overall, this is a play on methanol (which is quite volatile) and the share price will react accordingly.
Mat