how is Saint John ‘s economy affected more than 100%.

Thank you to overcook for the source. I only had a screen capture from CBC. Looking at the source, Saint John’s exports to the USA were 10 million. But the GDP of Saint John is only 6.8 million. Does that mean that 3.2 million is not reported as GDP and is being smuggled tax free to the US?

If you post a link to where you got it, we could read it too.

https://businessdatalab.ca/publications/which-canadian-cities-are-most-exposed-to-trumps-tariffs/

Says here that it's because the index is the sum of a city's export "intensity" ("they export more goods to the U.S. as a share of their local economies") and their dependence on exporting to the US. St. John's Irving Oil Refinery exports 80% south plus the seafood and forestry products primarily go to the US as well.

I think it's that they're not expected to profit less, it's that it's trajectory is pricing them out of existence.

An index doesn't necessarily mean it's "what percentage of the economy is affected by trade." But without the source, it's hard to say what exactly it is a percentage of.