Swiss exchange challenges GAM over Cantab Capital takeover

ZURICH (Reuters) - The Swiss stock exchange's listing authority said on Wednesday that asset manager GAM Holding understated liabilities from its 2016 takeover of Cantab Capital Partners in its financial reporting.GAM bought Cantab Capital Partners three years ago for $217 million (169 million pounds), plus deferred consideration, part of the Swiss company's efforts to diversify and add $4 billion in assets. SIX Swiss Exchange said GAM Holding's deal with Cantab -- leaving 40% of future..