(Bloomberg) -- AMP Ltd., one of Australia’s top asset managers, has ditched bonds from some of its retirement funds with sovereign debt no longer offering the diversification investors have relied on for decades as a ballast against stock volatility.Most Read from BloombergExxon to Change Name for First Time in Decades After RedomicileGermany Rejects Trump’s Demands for NATO Loyalty to WashingtonMeta Is Planning a Cloud Business to Sell AI Computing PowerRussia Indicates Ukraine Fired Long-Range