Asian investors have joined a series of landmark international lawsuits being filed against the Swiss government over its handling of the takeover of troubled bank Credit Suisse.
In March, Swiss authorities forced Credit Suisse to merge with larger rival UBS amid fears it could collapse.
The move rendered worthless $17bn (£13.5bn) of bonds held by investors.
"Everything unravelled so quickly," said one bondholder in Singapore who spoke to the BBC anonymously.
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