Concerns among Credit Suisse shareholders in the wake of its purchase by main rival UBS.

The $3.2-billion purchase has been driven by regulators, but normally shareholders would have a say in whether a takeover happens.

Credit Suisse's largest shareholder, Saudi National Bank, has lost more than US$1 billion from the purchase.

JMI Wealth Director Andrew Kelleher told Mike Hosking it raises an important question of what might happen in similar situations.

He says shareholders may start to think of cutting and running earlier and wonders if this will accelerate or exacerbate other issues.

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