Dow Jones Underperforms S&P 500 by 0.6 Point; Cisco Weakness Highlights Price-Weighted Index Effect
13 August 2026

Dow Jones Underperforms S&P 500 by 0.6 Point; Cisco Weakness Highlights Price-Weighted Index Effect

NEW YORK, August 13, 2026, 13:22 EDT — US stock markets were trading.

  • The Dow declined by 96 points and the S&P 500 rose 0.43%.
  • The price weighting intensified Cisco’s decline and dampened gains from the chip rally.
  • July producer prices remained flat, supporting expectations for the Federal Reserve to pause rate hikes in September.

The Dow Jones Industrial Average fell by 96 points on Thursday as the S&P 500 touched an intraday record high. The divergence was driven by index construction, not widespread risk-off sentiment.

Stock chart for INDEXDJX:.DJI

At 12:04 EDT, the Dow was behind the S&P 500 by 0.61 percentage point and was 0.76 point under the Nasdaq Composite. Cisco Systems dropped 9%, weighing on the price-weighted index.

US indexLevel at 12:04 EDTMoveGap versus Dow
Dow Jones Industrial Average53,674.13-0.18%
S&P 5007,781.59+0.43%up 0.61 points
Nasdaq Composite26,741.66+0.58%up 0.76 points
Intraday readings and calculated percentage-point gaps. Reuters

The Dow consists of 30 stocks and is weighted by price, making a share’s dollar change have greater impact than its market capitalization. In contrast, the S&P 500 and Nasdaq assign more weight to larger companies.

On Thursday, every $1 shift in a Dow stock moved the index by approximately 5.94 points. Cisco’s drop of $10.77 cut about 64 points from the index. That accounted for two-thirds of the Dow’s 96-point midday fall, according to an initial estimate.

Dow component signalShare moveApproximate Dow effectIndex role
Cisco Systems -$10.77-64 pointsTop decline driver
3M -$2.84-17 pointsSecond-biggest fall
Goldman Sachs +$17.03 earlier+101 points earlierLeading early lift
Microsoft +$6.82 earlier+41 points earlierNo. 2 early boost
Estimated effects apply the published 5.94-point impact per $1 share move. Prices were captured at different intraday timestamps. MarketWatch Dow decline; MarketWatch early rally

The composition gap favored different results in chips. Sandisk surged 15%, while Micron Technology advanced 5.6%. Both stocks are absent from the Dow. The PHLX semiconductor index increased by 1.8%.

The tape showed strength, with advancing stocks leading decliners by a margin of 1.78 to one on the New York Stock Exchange. On the Nasdaq, the ratio stood at 1.41 to one. The S&P 500 recorded 28 new 52-week highs and a single low.

GuideStone managing director Josh Chastant said, “We’re starting to see broad-based earnings really pick up across sectors.” Chastant said value was now expanding from data-center suppliers to those building models. Reuters

Market breadthAdvancersDeclinersRatio
NYSENot disclosedNot disclosed1.78 to 1
NasdaqNot disclosedNot disclosed1.41 to 1
S&P 500 new 52-week extremes28 highs1 low28 to 1
Nasdaq new 52-week extremes129 highs68 lows1.90 to 1
Latest breadth snapshot at 12:04 EDT. Reuters

Risk appetite was supported by macro conditions. The Producer Price Index for July showed no change, and yearly inflation eased to 4.7%. Prices for final-demand goods dropped 0.7%, counterbalancing a 0.2% increase in services.

Markets reflected a 65% probability that the Federal Reserve would keep rates unchanged in September. Brent crude declined by 3%. These developments helped reduce valuation pressures, particularly beyond the Dow’s traditional price-weighted approach.

Named analyst or market viewRecommendation or stanceEvidence
Mohit Kumar, JefferiesRecommends overweight on AI sectorCites robust earnings from infrastructure and ongoing capital expenditures
Josh Chastant, GuideStonePositive outlook for broad AI exposureNotes earnings strength is shifting to those developing models
Rate futures marketPreference for Fed to maintain ratesMarket prices in 65% chance for September
Current institutional and market stances, not personalized investment advice. Reuters global markets; Reuters US markets

The Dow’s early moves reflected high sensitivity. An initial rise of 184 points was driven by gains in Goldman Sachs and Microsoft. Losses from Cisco and 3M then wiped away roughly 81 points. The index fluctuated, even with encouraging inflation data and strong market breadth.

Risks: Cisco shares may recover ahead of the close, swiftly narrowing the divergence. Oil prices and Treasury yields are also subject to reversal. Intraday readings reported with a delay might not match actual trading prices.

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Further analysis

What led to a drop in the Dow as the S&P 500 hit an all-time high?
The Dow, made up of just 30 stocks, is price-weighted. Cisco’s share-price drop of around $10.77 accounted for a loss of about 64 points from the Dow, due to the reported divisor offset. At the same time, chipmakers Sandisk and Micron boosted both the S&P 500 and Nasdaq, but they are not included in the Dow index.
Did the Dow’s drop signal a broader market warning?
No. On the NYSE, advancing stocks led decliners by a ratio of 1.78 to one, while on the Nasdaq the ratio was 1.41 to one. The S&P 500 recorded 28 new 52-week highs and just one new low. This market breadth indicates that the Dow’s underperformance was primarily influenced by construction names and select individual stocks, rather than widespread selling.
What factors could help the Dow narrow its performance gap?
A recovery in Cisco, or further advances in high-value Dow stocks like Goldman Sachs and Microsoft, could rapidly close the gap. The primary variable is intraday volatility, as price weighting tends to exaggerate sizable dollar swings both up and down.
Mateusz Kaczmarek

Mateusz Kaczmarek is a financial and technology journalist at TS2.tech, covering stocks, artificial intelligence, semiconductors and global market developments. A graduate of the Poznań University of Economics and Business, he previously worked in financial analysis before moving into business journalism. His reporting focuses on technology companies, market trends and the forces shaping global investment markets. Follow Mateusz Kaczmarek on Google News.

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