Stock Market Fluctuates As Investors React to Various Company News

The S&P 500 futures were up in premarket trading, while AMC Entertainment and Mosaic lagged.
Keysight Technologies' stock fell ahead of its earnings report.
The US markets closed up on Monday, led by NVIDIA.
There is a potential second bidder for US Steel.
The US markets closed down on Tuesday, with On Holding taking the biggest hit.