 |  | Uber officially welcomes as CEO Expedia's Dara Khosrowshahi |  | SAN FRANCISCO (Reuters) - Uber Technologies Inc [UBER.UL] officially welcomed its new Chief Executive Dara Khosrowshahi, who has led online travel business Expedia Inc for 12 years, in a note sent to employees of the world's biggest ride-services company late on Tuesday. | |  |  |  | Under investor pressure, Goldman to explain trading strategy |  | NEW YORK (Reuters) - Goldman Sachs Group Inc will detail plans to turn around performance at its core bond-trading unit next month after unusual pressure from large investors frustrated by vague explanations of its troubles, people familiar with the matter told Reuters. | |  |  |  | AT&T to expand 5G U.S. broadband trials |  | NEW YORK (Reuters) - AT&T Inc said on Wednesday that it is expanding its 5G trials to include three new U.S. cities by the end of the year as part of its push to develop a next-generation network. | |  |  |  | Siemens buys self-driving software specialist Tass |  | FRANKFURT (Reuters) - German industrial group Siemens has agreed to buy Dutch self-driving software specialist Tass International for an undisclosed sum to strengthen its automotive business, it said on Wednesday. | |  | |  |  | |  |  | Related Video | |  | |  | |  |  |  |  |  | Counterparties is a curated snapshot of the best finance news and commentary around the web. 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