(Bloomberg) -- Blue-chip firms have sold $188.57 billion of bonds in the US in January, setting a record for the month, as companies look to take advantage of drops in longer-term borrowing costs. Most Read from BloombergTraders Line Up for ‘Once-in-a-Generation’ Emerging Markets BetTrump Cash Stockpile at Risk From $450 Million Dual VerdictsBlackstone Is Building a $25 Billion Empire of Power-Hungry Data CentersAmazon Drops iRobot Deal; Roomba Maker Cuts 31% of StaffUS Weighs Response to Deadly