Bloomberg For all the hand wringing over the end of ultra-loose monetary policy, the world just doesn’t seem able to shake its addiction to negative-yielding debt. Only two months ago, speculation was rife that the Bank of Japan would have to step in to stop yields from rising. Now, rates on benchmark bonds are poised to drop back below zero. …

Bloomberg United Continental Holdings Inc. agreed to acquire a stake in ExpressJet Airlines, one of its regional affiliates, in a $70 million deal that will give the No. 3 US carrier more control over short-distance flying and a fleet of about 150 small jets. By gaining sway over more United Express service, the purchase furthers United’s plan to bolster service …

Bloomberg Puma’s latest contribution to the world of retro footwear — or is it the wearable tech movement? — is a revamped 32-year-old sneaker with computers in its heels. The German company is selling a refurbished version of its 1986 RS-Computer shoe, which presaged an era in which athletes use gadgets to keep track of steps taken, distances covered and …