"It should work out as a zero sum game, " said Michael Trippit of Oriel Securities.

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"I think it will be a similar company, " said Redwan Ahmed, analyst with Oriel Securities in London.

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"I think it has absolutely zero credibility, " Emma Ormand, a director at Oriel Securities, told BBC Radio 4's Today programme.

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Analysts at Oriel Securities said that the Basel III regulations were positive for U.K. banks because they complied well with the new guidelines.

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"I don't know if this is the death knell for Barclays' bid, but right now, if you put aside the litigation risk, you'd have to say RBS is out in front, " Oriel Securities analyst Mike Trippitt told Thomson Financial.

FORBES: Barclays Hears Dissent On ABN Amro

Michael Trippitt of Oriel Securities said HSBC had been looked at unfairly by the market for having a relatively low core capital ratio, a key measure of a bank's reserves to back up its lending and investment portfolio.

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