美国国家运输安全委员会：瑞安航空发动机故障导致机舱失压。

People familiar with the matter say OpenAI has completed a transaction to buy back about $7bn of shares from current and former employees as it prepares for a possible IPO. Sources said the tender did not involve external investors and bought shares directly from employees. The deal values OpenAI at $852bn, matching its most recent financing round. The company had previously invited investors such as Thrive Capital and SoftBank to purchase employee shares.

现货黄金日内涨幅扩大至1.00%，现报4434.15美元/盎司。