This is a headline. AMB is the name of a company. I understand it's about the shares of the company, but what does 'on bid hopes' mean here?

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I'm no expert on this, but my guess is that the shares have gained in value because people are hoping that someone has made (or will make) a bid to purchase or take over the company. Does this make sense in the context?
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I think it does, I don't have much context myself - just the headline...
Could it mean the opposite, i.e. AMB making a bid to take over another company?
Yes, that probably makes more sense!