New York / AFP Shares of Oi SA tumbled on speculation that Brazil’s most indebted telecommunications operator is closer to filing for bankruptcy protection after documents showed little sign of progress in talks with bondholders. The documents give a glimpse into just how complicated the restructuring is. Rio de Janeiro-based Oi, which has about 50 billion reais in debt ($14.5 …

  New York / Bloomberg The biggest US airlines missed their chance to lock in the cheapest energy costs in more than 12 years after jet fuel surged as much as 80 percent since January. The fuel on the US Gulf Coast was trading at $1.37 a gallon on Friday, up from less than 80 cents on January 20, the …

  Bengaluru / Tribune News Service Hindustan Aeronautics Limited’s (HAL) Basic Trainer Aircraft, the HTT-40, made its maiden flight, just three years since its design phase, a record of sorts for the public sector company which has otherwise been associated with long delays in aircraft development. Built at a cost of Rs.350 crore, the HTT-40 will help the Indian Air …