Why Is the US Stock Market Down Today?

The US stock market opened lower on February 17, 2026, following the Presidents' Day holiday, with the S&P 500 initially down about 0.65% from Friday's high, though buyers stepped in to recover some losses by mid-session. Persistent fears that Artificial Intelligence will disrupt traditional software and tech models ("SaaSpocalypse") are weighing heavily on the market, making Information Technology the weakest sector.

Key economic data provided mixed signals: the Empire State Manufacturing Index showed modest expansion, and Canadian CPI cooled, supporting disinflation narratives. Meanwhile, indirect US-Iran talks resumed in Geneva. Technically, the S&P 500 briefly dipped below its 100-day Exponential Moving Average (EMA) before reclaiming it, suggesting potential mild recovery if it surpasses Friday's high of 6,889, but overall conviction is limited by stagflation concerns.

Sector rotation is evident, with defensives like Utilities (XLU) showing relative strength while the heavily weighted Technology sector (XLK) drags the broader index down. Synopsys (SNPS), a key semiconductor IP provider, dropped significantly (4.43%) due to AI anxiety, trading within a bearish flag pattern that suggests potential further downside if support breaks.

(Source：BeInCrypto)