 U.S. cybersecurity company CrowdStrike says there was no cyber attack and it has now issued a fix after it caused Microsoft Windows operating system to crash. Earlier, Microsoft had issued a workaround. That also helped a bit. U.S. Airlines, meantime, trying to get flying again after a ground stop. Headaches at U.S. banks as well and globally. Some JPMorgan Chase workers couldn't log on. The bank unable to process some trades. Norway's central bank earlier conducted a liquidity auction by email and phone.