What are today's top business/market headlines?

I'll gather today's top business and market headlines for you.

Today is Sunday, October 18, 2026 - U.S. markets are closed. Top business / market headlines are from Friday's close October 16-17:

Wall Street closes lower - Worst week for tech since June

•Major indices closed lower Friday October 16:

•The S&P 500 fell 85.44 points, or 1.10 percent, to close at 7,658.62

•The Nasdaq Composite declined 572.99 points, or 2.15 percent, to close at 26,137.85

•The Dow Jones Industrial Average shed 189.01 points, or 0.36 percent, to close at 51,990.05

Other closes reported as:

•Dow 52,002.41 (-175.28 / -0.34%)

•S&P 500 7,659.44 (-84.62 / -1.09%)

•Nasdaq 26,140.03 (-572.99 / -2.15%)

•U.S. stock markets fell sharply on Friday, October 16, as mounting concerns about artificial-intelligence financing spread from CoreWeave to major technology companies including Alphabet. The Nasdaq Composite dropped 2.1%, while the S&P 500 lost 1.1%, completing their worst weekly performances since June. The Dow Jones Industrial Average declined a more modest 0.3%

•Weekly picture:

•Dow Jones Industrial Average | 52,002.41 | -0.3% | +0.7%

•S&P 500 | 7,659.44 | -1.1% | Approximately -2.0%

•Nasdaq Composite | 26,140.03 | -2.1% | -4.5%

•The Nasdaq’s weekly decline ended a four-week winning streak

Why - AI credit anxiety

•AI infrastructure requires substantial spending and investors increasingly questioned whether revenues and profits would justify that spending, particularly for businesses dependent on debt financing

•CoreWeave became clearest expression - Its shares fell 12% on Friday as attention returned to its borrowing-heavy business model

•Chipmakers suffered particularly heavy losses. AMD declined 6%, Intel lost 5.8%, Micron Technology fell 5.6% and Broadcom dropped 4.5%

•All but seven of the S&P 500’s 75 technology-sector constituents finished lower

Oil, yields and commodities

•Oil reversed earlier weakness. Brent crude jumped 3.7% to settle at $109.86 per barrel, while West Texas Intermediate rose approximately 3.8% to around $101.71

•Treasury yields had retreated substantially from early-October peaks, but benchmark 10-year yield ended around 5.09%, compared with levels above 5.30% earlier in the month

Futures / Global cue for Monday

•Asia-Pacific markets set to slip, tracking tech losses on Wall Street; Nikkei futures signal 3% slide

2.[[October 17, 2026 US Stocks] Tension in the market as high-tech stocks plummet and crude oil breaks $100; ripples of AI credit anxiety spread](https://summamoney.com/investing/the-daily/october-17-2026-us-stocks-tension-in-the-market-as-high-tech-stocks-plummet-and-crude-oil-breaks-100-ripples-of-ai-credit-anxiety-spread/)

Citations (3)

1qazinform.comNot yet classified
Wall Street stocks close lower
Backs: “Wall Street closes lower - Worst week for tech since June”
2summamoney.comNot yet classified
[October 17, 2026 US Stocks] Tension in the market as high-tech stocks plummet and crude oil breaks $100; ripples of AI credit anxiety spread
Backs: “The Dow Jones Industrial Average shed 189.01 points, or 0.36 percent, to close at 51,990.05”
3eurasiabusinessnews.comNews and media
Stock Market Today: AI Selloff Sends Wall Street to Worst Week Since June
Backs: “The Nasdaq Composite dropped 2.1%, while the S&P 500 lost 1.1%, completing their worst weekly performances since June.”