DUBAI / Reuters Oman’s central bank signed a memorandum of understanding with the Iranian central bank to strengthen financial and economic cooperation between the two countries, the Omani institution said. It did not give details of the cooperation, but said the agreement would boost bilateral trade and include training for Iranian central bankers. Worried by the threat of U.S. …

  Bloomberg Central banks did their best to fight deflation. Now a Polish policy maker wants his government to step up as prices are making a comeback. As the National Bank of Poland comes under pressure to act in response to a rebound in price growth, Jerzy Osiatynski counters that it “has no monopoly on fighting inflation.” Higher wages raise …

  Bloomberg Chinese ride-sharing giant Didi Chuxing is weighing whether to take a $6 billion investment backed by SoftBank Group Corp. that could dilute existing backers such as Apple Inc., people familiar with the matter say. If the deal goes through, the funding would be the single largest for a Chinese technology startup on record. But the Beijing-based company that …