Why Did Wall Street Rise Friday? AI Shares Helped Despite High Bond Yields

U.S. stocks ended higher Friday as gains in Microsoft and other artificial-intelligence-related companies helped Wall Street absorb another unsettled day for oil prices and Treasury yields.

The S&P 500 gained 39.28 points, or 0.51%, to 7,743.41. The Dow rose 478.64 points, or 0.93%, to 51,828.62. The Nasdaq added 129.34 points, or 0.48%, to 27,068.72. All three indexes finished the week higher after a stretch of trading shaped by concern about inflation, the war with Iran and the cost of borrowing.

Friday’s advance did not signal that those concerns had disappeared. Rather, investors bought companies they expect to benefit from AI spending, while a retreat in oil prices from recent highs provided some relief. Bond yields, which influence borrowing costs and the appeal of stocks relative to government debt, remained unusually high.

The two forces explain much of the day’s action: optimism about technology-company growth supported the major indexes, even as energy and interest rates continued to threaten the broader rally.

AI shares supplied the lift

Microsoft was one of the market’s most important contributors. Its shares rose 3.7% after the company introduced changes to its Copilot app, including a tool called Code that lets users build software with plain-language instructions and Autopilot, an AI agent designed to continue working on assigned tasks. Microsoft said the tools will roll out in stages, beginning with early-access and private-preview customers; the announcement was not a report of revenue already earned from them.

Microsoft’s gain mattered disproportionately because of its size. The S&P 500 weights its members by market value, so a move in one of its largest companies can have a greater effect on the index than a similar percentage change in a smaller stock.

Other technology shares advanced. Qualcomm gained 4% and Dell rose 5%, according to Reuters. Akamai Technologies added 3.2% after announcing an $11.6 billion cloud-services arrangement with Anthropic. The agreement includes a warrant that could give Anthropic a stake of up to 5% in Akamai. Those figures describe a corporate agreement and a potential equity stake; they should not be read as Akamai receiving $11.6 billion in cash on Friday.

Meta Platforms provided a reminder that the AI trade did not lift every company every day. Its shares fell 3.3% Friday after a strong weekly run associated with investor interest in its Muse AI agent. Reuters reported that the stock was still up about 13% for the week.

Seven of the S&P 500’s 11 sectors rose Friday, led by information technology, which gained 0.91%. Industrials rose 0.6%. Advancing S&P 500 stocks outnumbered decliners by about 1.9 to one, suggesting the day’s advance was not confined entirely to a handful of technology giants.

But the week’s broader pattern was more complicated. Reuters reported that an equally weighted version of the S&P 500, a measure that gives each company the same influence, was down about 4% so far in September, while the standard, market-value-weighted index was little changed for the month. Large technology stocks have helped keep the headline index relatively resilient even as many other shares have struggled.

Oil and bonds remained obstacles

A cooling in oil prices helped stocks Friday by easing, at least temporarily, concern that energy costs would add to inflation and further pressure consumers and businesses. Associated Press market coverage described Brent crude falling below $98 a barrel during the session. Reuters’ closing report said Brent had eased but remained above $100 a barrel. The reports appear to reflect prices observed at different points or under different market quotations; neither supports presenting one precise figure as the uncontested closing price here.

The direction of the move was clearer than the exact threshold: oil had retreated from recent pressure but remained high enough to keep investors focused on inflation and the Iran conflict. Reuters also reported that accounts of continuing U.S.-Iranian discussions about a possible phased path out of the war helped market sentiment. Those discussions were reported as exploratory, not as a completed agreement.

Treasury yields added another layer of volatility. The U.S. 10-year yield reached a fresh 19-year high, according to Reuters, which reported it at 5.196% late in its market account. Other coverage noted that yields eased after an earlier spike, helping stocks recover strength later in the session. Those accounts describe an intraday swing rather than a simple, uninterrupted fall in borrowing costs.

A higher Treasury yield can make stocks less attractive to investors seeking returns with lower risk. It can also raise financing costs for companies and households. Growth stocks can be especially sensitive because much of their expected value depends on earnings projected further into the future.

The Federal Reserve is part of that calculation. Reuters reported that traders were pricing about a 66% chance of an interest-rate increase of at least a quarter percentage point in October, up from roughly 50% earlier in the week, according to CME Group’s FedWatch tool. That is a market-implied probability, not an announcement of what the Fed will do.

Economic reports sent mixed signals

Friday’s data gave investors reasons to see both resilience and inflation risk.

A U.S. Census Bureau report showed that August orders for nondefense capital goods excluding aircraft, a closely watched measure of business equipment investment, rose 1.6% from July, according to Reuters’ analysis of the release. Shipments of those goods rose 0.6%. The stronger-than-expected orders suggested that businesses were still investing, including in equipment associated with AI infrastructure. Total durable-goods orders were essentially unchanged.

That distinction matters. A strong number for one category does not mean every part of manufacturing expanded. It does, however, help explain why investors remained willing to buy companies exposed to capital spending despite worries about rates.

Consumer sentiment presented a less encouraging picture. The University of Michigan’s final September survey put its index at 48.1, down from 51.7 in August. Respondents’ expected inflation over the next year rose to 4.6%, from 4.0% the previous month. These are surveyed expectations, not a measurement of inflation that has already occurred.

For the Fed, that combination is awkward: business investment appears firm while consumers express greater concern about prices. If inflation remains elevated and the economy holds up, policymakers may have less reason to reduce borrowing costs. If growth weakens, the trade-offs become more difficult.

Friday’s gain therefore should not be mistaken for an all-clear on inflation. It showed that investors were prepared to reward selected companies with credible growth prospects even while broader monetary and geopolitical risks remained.

What the week revealed

The S&P 500 closed Friday within 0.7% of the record high it set in August, according to the AP. Its 1.2% weekly gain ended a two-week losing streak. The Dow rose 0.3% for the week, while the Nasdaq gained about 2% to 2.1%, reflecting its greater exposure to technology shares. Smaller companies did not share equally in the advance: the Russell 2000 slipped 0.8% for the week despite a small rise Friday.apnews+1

That gap is an important qualification to any claim that “Wall Street” broadly recovered. The major indexes closed higher, and more S&P 500 stocks rose than fell Friday. Yet the strongest weekly gains were concentrated in areas linked to AI, while smaller companies and other sectors faced the continued weight of high interest rates.

Valuations also require context. Reuters, citing LSEG data, reported that the S&P 500 traded during the week at just under 19 times expected earnings, its lowest forward price-to-earnings ratio since 2023. That does not mean stocks are necessarily inexpensive. The ratio can fall because prices decline, because earnings forecasts rise, or both. AI-related heavyweight companies have contributed to the recent increase in expected earnings. Those forecasts remain estimates, not guaranteed profits.

For global readers, the day’s U.S. market moves matter beyond New York. Treasury yields help set financing conditions internationally, oil prices affect import bills and inflation, and large U.S. technology companies influence portfolios around the world. Friday’s trading reflected the intersection of all three forces rather than one isolated piece of corporate news.

What investors will watch next

The next tests are scheduled, not hypothetical. Wednesday’s U.S. personal consumption expenditures price index will offer another reading on inflation. The monthly employment report is due Friday, Oct. 2. Both will be examined for clues about whether the Federal Reserve is likely to raise rates again.

A Reuters poll cited in its week-ahead report expected the September employment report to show about 100,000 jobs added and an unemployment rate of 4.2%. Those are forecasts and may differ from the figures the government ultimately reports. In the previous available reading, the core PCE index was up 3.3% over the 12 months through July, above the Fed’s 2% inflation target. Next week’s release will show whether the trend has changed.

Company announcements will also matter. Investors will assess whether the investment flowing into AI products and infrastructure produces sustained sales and profits, rather than only new deals and demonstrations. Meanwhile, oil and bond markets could change the setting quickly if the Iran conflict, inflation expectations or rate outlook shift.

For Friday, the answer to why Wall Street ended higher is specific: Microsoft and other AI-related shares rose, oil pressure eased from recent levels, and enough other S&P 500 stocks advanced to carry the indexes upward. The unresolved question is whether that support can withstand the next round of inflation and jobs data while Treasury yields remain high.