Here are numbers:
At 6:50 AM today, $1.5 BILLION in notional value worth of S&P 500 futures contracts were bought. This trade was so large that it sent the entire index +0.3% higher by the minute.
At 7:04 AM ET, President Trump announced "productive discussions". By 7:10 AM ET, the S&P 500 had added +$2 TRILLION in market cap.
That $1.5 billion position gained +$60 million in minutes