LONDON (Reuters) -Bond yields across southern Europe soared on Thursday after the European Central Bank signalled a string of interest rate hikes starting in July to tame stubbornly high inflation. European stocks fell on confirmation that the ECB would end its Asset Purchase Programme, its main stimulus tool since the euro debt crisis. Policymakers flagged a 25 bps move in July and said they may move again in September, possibly by a bigger margin. Money markets ramped up bets for ECB rate hikes and are now pricing in 145 basis points worth of increases in 2022. Italy’s 10-year bond yield ros…