Dow, S&P 500 Post Sharpest Weekly Drop Since March as Treasury Yields Hit 5.34%, Oil Tops $93
Authored By HDFC SKY | Published at: Aug 22, 2026 07:50 PM IST
Mumbai, Aug 22: US stock markets concluded the week ended 21 August 2026 with benchmark indices registering their first weekly decline in a month, as 30-year Treasury yields climbed to their highest level since 2007 and Brent crude surged above $93 per barrel amid escalating US-Iran tensions.
The Dow Jones Industrial Average fell 1.81% for the week, the S&P 500 declined 1.85%, and the Nasdaq Composite dropped 2.48%, marking the second consecutive weekly loss for the Dow and its steepest weekly decline since mid-March.
The selling pressure was broad-based, with nine of the 11 S&P 500 sectors ending in negative territory, as investors grappled with the dual headwinds of rising borrowing costs and geopolitical uncertainty.
30-Year Treasury Yields Surge to 5.34%, Highest Level Since 2007, as Fiscal Concerns Weigh
Long-term Treasury yields remained a major headwind for US equities during the week. The 30-year Treasury yield climbed to 5.34%, its highest level since 2007, before easing, while the 10-year yield reached around 4.73%, its highest in nearly 18 months.
To support longer-dated securities, the US Treasury announced it would double the maximum size of liquidity-support buyback operations from $2 billion to at least $4 billion per operation, effective from 9 September through 4 November. Treasury Secretary Scott Bessent indicated the programme could be expanded further, but the measure provided only temporary relief as yields moved higher again.
Meanwhile, US federal debt surpassed $40 trillion for the first time, roughly double the level a decade ago. Annual interest payments have exceeded $1 trillion, accounting for nearly 15% of federal spending. Rising borrowing costs, mounting fiscal pressures and geopolitical tensions weighed on risk appetite, encouraging investors to seek safer assets such as gold.
Dow Jones Industrial Average Falls 973.20 Points, or 1.81%, as 24 of 30 Components End in Negative Territory
The Dow Jones Industrial Average recorded its steepest weekly decline since mid-March. For the week, the Dow was down 973.20 points, or 1.81%. The index closed Thursday at 52,759.21 after falling 703.84 points, or 1.32%, in that session alone. Twenty-four components of the 30-stock index ended in negative territory on Thursday. The Dow opened Friday at 53,034.39, up 275.18 points or 0.52%, as markets attempted a recovery. The index touched an intraday high of 53,250 and an intraday low of 52,768.87 during Friday’s session.
The Dow’s weekly decline represented a pullback of nearly 2,000 points from its record high of 54,744 reached earlier in August. The index’s decline was broad-based, with significant losses across multiple sectors. The selling pressure was particularly pronounced in consumer discretionary and technology names, which had been leading the market higher in previous weeks.
The Dow’s weekly performance marked its worst since mid-March, reflecting growing investor concerns about the sustainability of the economic recovery amid rising borrowing costs and geopolitical uncertainty.
S&P 500 Declines 144.60 Points, or 1.85%, as Nine of 11 Sectors End in Negative Territory
The S&P 500 ended the week down 144.60 points, or 1.85%. The index closed Thursday at 7,641.16 after falling 66.82 points, or 0.87%, in that session. Out of the 11 broad sectors, nine ended in negative territory on Thursday, with only energy and real estate managing to post gains. The S&P 500 opened Friday at 7,671.56, up 29.90 points or 0.39%. The index touched an intraday high of 7,678.16 and an intraday low of 7,660.83 during Friday’s session.
For the year, the S&P 500 remained up approximately 795 points, or 11.6%. The equal-weight S&P 500 fell 0.9% for the week, outperforming the market-cap weighted index as mega-cap technology stocks bore the brunt of the selling. The S&P 500 posted 16 new 52-week highs and three new lows on Thursday. The index’s decline was driven primarily by weakness in the technology and consumer discretionary sectors, which have been the primary drivers of the market’s gains in 2026.
The selling pressure was exacerbated by rising bond yields, which reduced the present value of future earnings for growth-oriented companies, and by concerns about consumer spending resilience following weak retail sales data.
Nasdaq Composite Drops 662 Points, or 2.48%, as Technology Stocks Bear Brunt of Selling
The Nasdaq Composite bore the brunt of the selling pressure, particularly from the technology and semiconductor sectors. For the week, the Nasdaq was down 662 points, or 2.48%. The index closed Thursday at 26,067.17 after falling 263.92 points, or 1%, in that session. The Nasdaq Composite had fallen 355.20 points, or 1.33%, on Tuesday alone to 26,289.71. The index opened Friday at 26,198.84, up 131.7 points or 0.51%. The Nasdaq touched an intraday high of 26,198.84 and an intraday low of 26,067.17 during Friday’s session.
The Nasdaq Composite closed below its August 4 follow-through day low on Thursday, a technical signal that market participants view as highly bearish for the sustainability of the rally. The Nasdaq Composite recorded 67 new highs and 104 new lows on Thursday. The technology-heavy index was particularly vulnerable to rising bond yields, as higher discount rates reduce the present value of future earnings for growth-oriented technology companies.
The semiconductor sell-off on Tuesday and Wednesday, which saw the Philadelphia Semiconductor Index plunge 5.6%, weighed heavily on the Nasdaq, given the significant representation of chip stocks in the index.
Russell 2000 Falls 2% as Small-Caps Underperform; Dow Transports and Utilities Face Headwinds
The Russell 2000 index of smaller companies fell 1.34% on Thursday to 2,992.43. For the week, the Russell 2000 declined approximately 2.0%. The index opened Friday at 3,010.95 and gained 20.98 points, or 0.70%, to close at 3,013.41. The Russell 2000 was on track for its worst week since June 5 as growing US-Iran tensions pushed crude prices higher. Small-cap stocks, which had been outperforming large-cap benchmarks in recent weeks, gave back gains as rising oil prices raised concerns about input costs for smaller companies.
The Dow Jones Transportation Average, which is sensitive to energy costs, rose 218.6 points, or 1.02%, on Friday to 21,600.9. The Dow Jones Utility Average, which faces headwinds from rising bond yields that make dividend-paying stocks less attractive, moved in tandem with the Composite.
The Dow Jones Composite Average gained 96.9 points, or 0.58%, on Friday to 16,841.5. Value stocks outperformed growth stocks during the week, with the value index declining just 0.6% compared to a 3.2% decline in growth stocks, as high-valuation technology names sold off most aggressively. The rotation away from growth stocks and toward value stocks reflected investor concerns about the impact of rising rates on long-duration assets.
S&P 100 Gains 0.51% on Friday; Philadelphia Semiconductor Index (SOX) Plunges 5.6% in Worst Single-Day Drop Since July 1
The S&P 100 index, which tracks the largest US companies, gained 0.51% on Friday. The Philadelphia Semiconductor Index (SOX) experienced a volatile week. The index had jumped 21% from its July 29 low through Monday’s close, meeting the definition of a new bull market run. However, Tuesday saw the SOX plunge 5.6%, its biggest decline since July 1. All 30 SOX components declined on the same day for the first time since July 29. The index fell approximately 5% again on Wednesday, extending the sell-off. On Thursday, the SOX recovered 61.79 points, or 0.53%, to 11,800.02.
However, on Friday, the SOX declined 1.05% to 11,675. The volatility in the semiconductor index reflected profit-taking after the sharp recovery from recent lows, combined with concerns about rising bond yields and their impact on growth stocks.
The semiconductor sector had been a primary beneficiary of the artificial intelligence boom, but the sharp decline indicated that investors were reassessing valuations in the face of rising discount rates.
NYSE Composite, S&P MidCap 400 and S&P SmallCap 600 Track Broader Market Decline
The NYSE Composite Index tracked the broader market’s downward movement during the week. Small-cap and mid-cap indices, which had been outperforming large-cap benchmarks in recent weeks, also gave back gains. The S&P MidCap 400 and S&P SmallCap 600 both declined during the week.
The S&P MidCap 400 ETF (MDY) experienced an approximate $208.9 million outflow during the week, a 0.8% decrease week over week. Mid-cap funds recorded outflows of $809 million during the week, while small-cap funds recorded outflows of $70 million. The outflow from mid-cap funds suggested that investors were reducing their exposure to riskier assets amid the market uncertainty.
The NYSE Composite, which includes a broad range of companies from large-caps to small-caps, reflected the overall weakness in the market, declining in line with the major indices.
CBOE Volatility Index (VIX) Rises as Market Uncertainty Intensifies
The CBOE Volatility Index (VIX), Wall Street’s fear gauge, had reached a 2026 low of approximately 14.18 earlier in the week, indicating unusually calm market conditions. However, the VIX rose by about a point and a half during the current week as investors fretted about the move higher in bond yields.
On Friday, the VIX stood at 15.7, down on the day but still significantly elevated from its weekly low. The VIX’s rise from its 2026 low reflected increased uncertainty about the direction of interest rates, inflation and geopolitical developments. A higher VIX indicates that investors are pricing in greater volatility in the coming months, which typically corresponds to increased hedging activity and a more cautious market posture.
The VIX’s spike was driven by concerns about the impact of rising bond yields on equity valuations, the potential for further escalation in the US-Iran conflict, and mixed economic data that complicated the Federal Reserve’s policy outlook.
S&P 500 Sector Performance: Energy Outperforms as Technology and Industrials Lag
Sector performance was mixed but predominantly negative, with energy outperforming while technology and industrials lagged. Energy was the best-performing sector, gaining nearly +5% for the week, benefiting from the surge in crude oil prices above $93 per barrel. The sector was the only one to post meaningful gains as oil prices rose on supply concerns stemming from the escalating US-Iran tensions. Healthcare was the second-best performer with a +3% gain for the week, driven by positive developments in the pharmaceutical and biotechnology subsectors.
Technology was the worst-performing sector with a -4.2% return for the week, weighed down by the semiconductor sell-off and rising bond yields. Industrials lagged with a -3.3% decline for the week, reflecting concerns about the impact of higher input costs and a potential slowdown in capital spending.
On Tuesday, energy gained 1.7%, healthcare rose 1.6%, and consumer staples advanced 1.0%, while technology fell 2.5%. Financials faced headwinds from the steepening yield curve, which compressed net interest margins. Utilities faced pressure from rising bond yields, which made dividend-paying stocks less attractive.
Real Estate also faced headwinds from rising yields, which increased borrowing costs for property owners. Consumer Discretionary underperformed on concerns about consumer spending resilience following weak retail sales data.
Magnificent Seven Performance Diverges as Tesla and Apple Bounce While Meta Slides
The Magnificent Seven stocks, Apple, Microsoft, Alphabet, Amazon, Nvidia, Meta Platforms and Tesla, showed divergent performance during the week. Tesla had the best week among the group, climbing about 7% to roughly $351 after a period of weakness, as investors looked past the recent stock decline and focused on the company’s long-term growth potential.
Apple jumped about 5% to roughly $317 and sits near +17% for the year, supported by strength in its services business and anticipation of upcoming product launches. Meta fell about 6% to around $546 and is still more than 16% red on the year, reflecting concerns about its heavy investment in artificial intelligence and metaverse technologies. Nvidia slipped about 3% to roughly $218 ahead of its August 26 earnings report, with investors taking a cautious stance ahead of the release.
As of mid-week, Nvidia was up about 15.2% year-to-date, Apple was up 16.9%, Amazon was up 17.4%, Alphabet was up 9.4%, Microsoft was up 2.4%, Meta was down 16.1%, and Tesla was down 19.9%. The Magnificent Seven ETF was down approximately 1.1% on Thursday, reflecting the overall weakness in the group.
Weekly Gainers and Losers Show Extreme Volatility Across S&P 500 and Nasdaq
The week saw extreme volatility across S&P 500 and Nasdaq components. Among the top weekly gainers, Moderna surged approximately 174% on the week following positive Phase 3 trial results for its mRNA cancer vaccine, making it the standout performer in the healthcare sector. ZeroStack gained 171% for the week, driven by a significant business development announcement.
Inovio Pharmaceuticals gained 68.8%, SanDisk gained 27.9%, and Robinhood Markets gained 13.19% on Friday alone. Coinbase Global gained 7.96% on Friday, benefiting from the surge in Bitcoin prices. Nordson gained 8.00% on Friday after reporting strong earnings. Among the top weekly losers, Walmart fell 9.15% on Thursday alone, making it one of the worst performers of the week, as investors reacted to its slowest comparable sales growth in six years.
Moderna fell 23.55% on Friday after its massive surge, as investors took profits following the extraordinary rally. Coherent fell 12.8% on Tuesday, and Lumentum fell 9.9% on Tuesday, reflecting the broader semiconductor sell-off. The extreme moves in both directions highlighted the heightened volatility and uncertainty in the market.
Economic Data, Fed Policy, Oil, Gold and Currencies Signal Growing Market Uncertainty
US economic data delivered mixed signals during the week, complicating the Federal Reserve’s policy outlook. Initial jobless claims fell 6,000 to 206,000 for the week ended 15 August, below the 210,000 consensus, while continuing claims increased 18,000 to 1.799 million. Retail and food-service sales declined 0.6% month-on-month in July, while the University of Michigan consumer sentiment index dropped to 51.0 from 55.2. In contrast, the August flash S&P Global Composite PMI climbed to 56.0 from 54.5, with Services PMI surging to a 20-month high of 56.8 from 54.6. Manufacturing PMI eased to 53.2 from 53.9, while the Philadelphia Fed Index rose to 47.4, well above the 25 consensus and July’s 41.4.
Federal Reserve minutes indicated that policymakers remain concerned about inflation, although a rate cut remains possible if confidence in the inflation outlook improves. Markets reduced the probability of a September rate move to 35% from 55% a week earlier. Attention now turns to the Jackson Hole symposium on 28 August and Chair Warsh’s policy remarks.
Commodity markets remained volatile. Brent crude rose more than 5% for the week to $93.73, after touching $94.71, amid escalating US-Iran tensions and concerns surrounding the Strait of Hormuz. WTI stood at $86.58, down 0.28% on Friday. Gold advanced 1.63% to $4,589.23, marking its third consecutive weekly gain, while Bitcoin surged about 7% and approached $80,000.
The US dollar weakened 1.1% for the week, with the DXY around 98.80–98.90. EUR/USD climbed to 1.1701, up 0.24%, while GBP/USD rose 0.37% to 1.3650. USD/JPY moved above 159.00, reflecting continued divergence in monetary-policy expectations between the US and Japan
Energy outperformed as rising oil prices supported the sector, while technology and consumer discretionary lagged amid higher bond yields. The 30-year Treasury yield hit 5.34%, pressuring valuations. Semiconductor stocks plunged 5.6%, highlighting growth-stock vulnerability, while mixed economic data complicated the Federal Reserve’s rate outlook.
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Source
- spglobal.com/spdji/en/indices/equity/sp-500/
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