SoftBank Group shares fell sharply on Thursday after Oracle's weaker-than-expected quarterly results renewed worries about how long it will take for massive investments in artificial intelligence infrastructure to translate into profits. The stock closed down nearly 7.7% in Tokyo, having dropped as much as 8.4% intraday, dragging the broader market lower. Oracle said its revenue and operating income for the latest quarter came in slightly below analysts' expectations, while also raising its spending forecas ...