The Dow Jones industrial average fell as much as 500 points at the open this morning. The Dow quickly recovered much of that loss and is up over 100 and went as high as over 300 points.
The loss began Friday as investors were concerned about accelerating inflation and higher interest rates.
The Dow has now rebounded, going over 400 points up on the day thus far. NASDAQ and the S&P are also up at session highs. (source)