Wouldn't surprise me. The Canadian government have previously...

Wouldn't surprise me. The Canadian government have previously blocked Chinese stakes in critical minerals companies.

This may be why Sigma came out a month or so ago and said they are listing the business on the Singapore stock exchange (which people assumed was to make the tax treatment for a potential takeover better than it otherwise would have been).

But perhaps it also has something to do with the Canadian government not wanting Chinese governments buying 'Canadian assets'.

You then run into the obvious question of 'what is a Canadian asset'. Just because Sigma is listed on the Toronoto Exchange doesn't really mean much, it's just the listing. The assets obviously physically exist in Brazil.

This from 2022:

https://www.reuters.com/markets/commodities/canada-orders-three-foreign-firms-divest-investments-critical-minerals-2022-11-02/