By Yoruk Bahceli (Reuters) – European companies hoping to fund M&A and capital expenditures on bond markets this year are facing a sudden jump in borrowing costs and wary buyers after the ECB’s shock pivot towards tighter monetary policy. Bond issues are a key source of funding for companies and have grown in importance relative to bank loans in the euro zone, particularly since the financial crisis. Caught out by European Central Bank President Christine Lagarde’s hawkish tone after the bank’s February meeting – which opened the door to rate hikes this year – bonds from investment-grade (IG) …