It hasn't been pretty, but the stock market was mostly rising on Monday. The Nasdaq Composite was up 0.5%. The tech-heavy index is riding another wave of dip-buying among artificial intelligence-linked stocks and Big Tech. That could explain why the Dow is fighting to pull back above breakeven. The S&P 500 was up 0.2% in early afternoon trading. It has stayed in positive territory today, though there have been several spikes and pullbacks. ...