kacy Ive read the article, there is no mention of ABC.
Now, i do think there's a chance that opes prime was a large holder of abs shares but that it would be fairly remote chance. Sure, a few individuals might have ABC shares in their opes prime margin lending account. Not enough to turn the course of a day's trading though I think.
Besides from what I have read about opes prime they are more active among the spec end of the market, ie loss making mineral explorers, not ASX200 companies like ABS (former ASX200 at least)
ABS
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