10 things that mattered on Monday, September 14, 2026
Cybersecurity and software stocks jumped after a weekend essay by Anthropic CEO Dario Amodei warned about AI-driven cyberattacks, while chipmakers and AI power suppliers sold off. The S&P 500 slipped 0.5% and the equal-weight index finished flat.
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The S&P 500 fell 0.5% while the average stock held flat
SPY closed at $760.88, 2.2% below its record. The Nasdaq 100 lost 0.8%, but the equal-weight S&P edged up 0.1%.
SPY, last six months SPY, last six months - 02
Cybersecurity stocks jumped on an AI warning
Amodei's Saturday essay called for a slower pace of frontier AI and warned of machine-speed cyberattacks. The Global X Cybersecurity ETF rose 10.7%, its largest gain since it launched in 2019, with Zscaler up 16.5% and CrowdStrike up 13.9%.
BUG (cybersecurity ETF), last six months BUG (cybersecurity ETF), last six months - 03
Software rallied alongside them
HubSpot rose 11.2%, Autodesk 7.8% and ServiceNow 7.4%. Adobe added 5.3%, extending Friday's post-earnings gain.
NOW, last six months NOW, last six months - 04
Chip stocks fell 5.5%
The iShares Semiconductor ETF closed at $497.40, its worst day since early July. Broadcom lost 4.8% and Nvidia 3.4%.
SOXX (semiconductor ETF), last six months SOXX (semiconductor ETF), last six months - 05
AI power and server names gave back Friday
GE Vernova fell 8.6% and Vertiv 7.7%. HPE dropped 10.7%, giving back nearly all of Friday's jump, and Dell lost 5.8%, about half of it.
VRT, last six months VRT, last six months - 06
New lows outnumbered new highs by 149 on the NYSE
194 stocks made new 52-week lows against 45 new highs, with the S&P 500 2.2% off its record. It is the third session at or below minus 100 since September 9.
NYSE-listed new highs minus new lows, last twelve months NYSE-listed new highs minus new lows, last twelve months - 07
Fear & Greed dropped to 32
The index fell from 41 on Friday, deeper into Fear. The VIX rose 1.26 points to 17.10.
VIX, last six months VIX, last six months - 08
The 10-year yield held at 4.96%
It slipped 1 basis point from Friday's close, the highest since October 2023. On September 8 it was 4.81%.
10-year Treasury yield (%), last twelve months 10-year Treasury yield (%), last twelve months - 09
Freight shipments grew from a year earlier
The Cass shipments index rose 5.6% in August and is 2.1% above a year earlier. In July it was 4.8% below, and the last year-over-year gain was in January 2023.
Cass freight shipments index, last five years Cass freight shipments index, last five years - 10
Due Tuesday: the Fed starts its meeting
No major US data are scheduled. The two-day FOMC meeting ends Wednesday at 2pm ET, the same day August retail sales come out.
Data as of the Monday, September 14, 2026 close. The ten items are picked by fixed rules from the site's daily data (the size of each move, signals that changed state, and economic releases weighted by importance), then checked and written by hand. Charts end on the brief's date. Research and education, not financial advice.