Closing changes:S&P 500 +0.4%Nasdaq Comp +0.7%DJIA +0.1%Russell 2000 +0.6%Toronto TSX Comp +0.6%US stock markets started the day lower but turned around mid-day and then FOMO took it a decent leg higher. Nvidia reversed higher after announcing a $100 billion investment with OpenAI. This article was written by Adam Button at investinglive.com.