https://www.reuters.com/article/us-sony-buyback/sony-announces-first-ever-share-buyback-stock-rises-5-percent-idUSKCN1PX00Q >Sony Corp announced on Friday a share buyback of 100 billion yen ($910 million) - its first ever aimed at boosting shareholder returns - sending the Japanese electronics and entertainment company's shares up more than 5 percent.