[Grammar] Against a positive outlook

[patran]

Dear Teachers

In the following sentence, is "against" below means "not" or "opposite"?

Against a positive medium-term growth outlook, Chinese shares are also trading at attractive valuations.

Regards

Anthony the learner

 

[5jj]

In the following sentence, [STRIKE]is[/STRIKE] does "against" below mean[STRIKE]s[/STRIKE] "not" or "opposite"?

Against a positive medium-term growth outlook, Chinese shares are also trading at attractive valuations.

It means 'In contrast to'.