Stay informed with free updatesSimply sign up to the Technology sector myFT Digest -- delivered directly to your inbox.It’s too soon to be talking about the Curse of OpenAI, but we’re going to anyway. Since September 10, when Oracle announced a $300bn deal with the chatbot maker, its stock has shed $315bn* in market value:Some content could not load. Check your internet connection or browser settings.OK, yes, it’s a gross simplification to just look at market cap. But equivalents to Oracle share...