A complete guide to how the S&P 500 has performed since the Iran war began, the five structural reasons Wall Street has not collapsed, what could break the market from here, and how investors should position their portfolios in one of the most uncertain macro environments since 2008.
Summary
On February 28, 2026, the United States and Israel struck Iranian nuclear and military facilities. Oil surged past $100 per barrel within days. GDP growth was already at 0.7%. The Federal Reserve was paralysed between inflation running at 3.1% and a weakening labour market. Prediction markets pushed recession odds above 40%. By every historical measure, this looked like the setup for a serious equity market selloff.
And yet as of March 17, 2026, the S&P 500 sits at approximately 6,699, just 3.2% below its all time high. It posted three consecutive losing weeks, the first such streak in about a year and touched a 2026 low of 6,632.19 on Friday March 14. But it has not collapsed. On Monday March 16, with oil briefly touching $106.50 per barrel, the S&P 500 still managed to close up 1.01% at 6,699.38. The Dow added 387 points. The Nasdaq gained 1.22%.
The question every investor is asking is: why? Why has the world’s most watched equity index held its ground through three weeks of war, $100 oil, and stagflation fears? And more importantly, will it continue to hold? This guide answers both questions using real data from the week’s trading, analysis from Wall Street’s top strategists, and a clear framework for understanding what could change the picture. Track the S&P 500 and top US stocks on MEXC’s live markets dashboard.
Key Highlights
- S&P 500 closed at 6,699.38 on March 16, up 1.01% – its best day in five weeks, even as Brent crude hit $106.50 per barrel intraday.
- The index is only 3.2% below its all time high, despite three consecutive losing weeks and a 2026 low of 6,632.19 on March 14.
- S&P 500 forward P/E has compressed to approximately 20x, down from 22x in late January making valuations look more reasonable even as macro risks mount, according to Yardeni Research.
- S&P 500 aggregate forward earnings hit a record $328.80 per share, according to Ed Yardeni – Wall Street analysts have continued raising 2026 and 2027 earnings forecasts despite the macro turbulence.
- Energy stocks surged since February 28: Exxon Mobil surpassed $157, ConocoPhillips gained over 5%, Occidental Petroleum hit a one year high of $59.15.
- The VIX fear gauge sits at 27.19, up 54% from a month ago elevated but well below the panic peak of 52 hit in April 2025.
- Wells Fargo Investment Institute notes that mounting escalations could suggest ‘both sides are facing growing constraints that may prevent a long conflict’ – a bullish signal for market stability.
1. What the S&P 500 Has Actually Done Since the Iran War Began
To understand the market’s resilience, you need to understand exactly what has happened day by day since the war began. The narrative is more nuanced than most headlines suggest.
1.1 Day One: February 28 – Resilience From the Start
When the US Israel strikes on Iran hit on February 28, the initial market reaction was swift but contained. The S&P 500 fell as much as 1.2% at its session lows before buyers stepped in. By the close, the index was essentially flat, up just 0.04% at 6,881.62. As CNBC’s live market coverage of the February 28 session reported, investors immediately rotated into the tech leaders of the bull market – Nvidia and Microsoft, treating them as cash rich companies resilient to any war impact. Oil stocks surged: Exxon and Chevron gained approximately 4%, ConocoPhillips rose more than 5%, and tanker stocks Frontline, DHT Holdings, and International Seaways gained 5% to 7% in a single session.
1.2 Weeks One to Three: Grinding Lower but Not Breaking
The three weeks that followed were painful but measured. CNBC’s March 14 market update confirmed that the S&P 500 posted its first three week losing streak in about a year, falling 1.6% in the week ending March 14 alone before closing at its 2026 low of 6,632.19. The Dow slid approximately 2% for the week. But crucially, the index remained above its 200-day moving average near 6,601, a technically significant level that institutional buyers defended on multiple occasions.
Consumer sentiment weakened but did not collapse. The University of Michigan’s Survey of Consumers posted a headline reading of 55.5 in mid March, down 1.9% from February. Survey director Joanne Hsu noted that ‘interviews completed prior to the military action in Iran showed an improvement in sentiment from last month, but lower readings seen during the nine days thereafter completely erased those initial gains.’ US crude oil surged approximately 35% in the week ending March 9, its biggest weekly gain in futures trading history dating back to 1983, as reported by CNBC’s March 9 live market update.
1.3 March 16: The Best Day in Five Weeks
On March 16, something shifted. Oil pulled back from its highs, Brent crude fell to $101.52 after hitting $106.50 intraday. Nvidia’s GTC conference kicked off with CEO Jensen Huang announcing $1 trillion in expected orders for Blackwell and Vera Rubin systems doubling year ago projections. Micron reported strong earnings guidance. The result: the S&P 500 jumped 1.2% intraday before closing up 1.01% at 6,699.38, its best day in five weeks. As the Associated Press reported, ‘such moves have been quick to reverse since the war in Iran began’ – a cautious note that the recovery is real but fragile.
2. Five Reasons the S&P 500 Has Not Collapsed
2.1 Earnings Expectations Remain Stubbornly Strong
The single most important reason the market has held up is that Wall Street analysts have not abandoned their earnings forecasts. According to 24/7 Wall St.’s analysis of S&P 500 resilience drivers, S&P 500 aggregate forward earnings reached a record $328.80 per share as of mid March 2026, with analysts continuing to raise earnings forecasts for 2026 and 2027 despite the oil shock and geopolitical uncertainty. This has compressed the forward P/E ratio from approximately 22x in late January to around 20x today making the index look more attractively valued even as macro risks have piled up.
In previous bear markets, the catalyst for sustained selling was earnings estimate cuts; analysts slashing profit forecasts as economic conditions deteriorated, forcing investors to reprice equities at lower multiples. So far in 2026, that repricing has not happened. The oil shock is real, but analysts are treating it as a temporary cost headwind rather than a structural disruption to corporate profitability at least for now.
2.2 US Energy Independence Creates a Natural Internal Hedge
One of the most structurally important differences between the 2026 oil shock and the 1973 and 1979 episodes is the United States’ position as the world’s largest oil producer. In the 1970s, oil price surges drained wealth out of the US economy to OPEC producers. In 2026, higher oil prices redistribute wealth within the domestic economy from consumers and industrial users to energy companies and their shareholders.
Energy companies constitute a meaningful share of the S&P 500’s market capitalisation and earnings. When Exxon surges past $157, ConocoPhillips hits new highs, and CF Industries reaches an all time high with 67.6% gains year to date on surging fertiliser demand, these gains partially offset the losses in airlines, consumer discretionary, and software stocks creating a natural internal hedge within the index itself that simply did not exist in previous oil crises.
For investors tracking AI sector performance and its relationship to broader equity markets, MEXC’s guide to the AI data centre boom and its impact on tech stocks and crypto markets provides essential context on the Nvidia driven AI investment theme.
2.3 Big Tech Is Being Treated as a Safe Haven Within Equities
Institutional investors facing an uncertain macro environment have been rotating within equities rather than out of them specifically into the cash rich, AI exposed technology giants that can absorb an oil shock without significant earnings damage. Nvidia, Microsoft, and Apple were among the most actively bought names during every market selloff since February 28. Nvidia alone rose 2.5% on March 16, representing the single strongest force lifting the S&P 500 that day, as CNBC’s March 15 live market coverage noted.
This flight to quality within equities rather than out of equities entirely is a distinctive feature of the current market environment. The iShares Expanded Tech Software ETF has fallen significantly from its highs, and the software sector broadly has sold off. But the Magnificent Seven names have shown remarkable relative resilience, providing a floor under the overall index that pure macro analysis would not predict.
2.4 Geopolitical Shocks Have a Strong Historical Recovery Pattern
Institutional investors know the historical data on geopolitical shocks intimately and it is consistently bullish for patient investors. The S&P 500 has on average been higher 1, 3, 6, and 12 months after comparable geopolitical crises. The 1990 Gulf War produced a 16% decline followed by a full recovery within six months. The 9/11 attacks caused an 11.6% drop that was fully recovered within two months. Even the 2022 Russia Ukraine invasion produced a near term bounce after the initial shock.
Paul Christopher, head of global investment strategy at Wells Fargo Investment Institute, offered the most measured institutional assessment available via the Wells Fargo Investment Institute Iran war update: ‘For all its dramatic swings, including several over the last two weeks that struck hour to hour, the S&P 500 is still only about 4% below its all time high. Escalations have been mounting quickly in the war, to be sure, but that could suggest both sides are facing growing constraints that may prevent a long conflict.’
2.5 The Defence Spending Boom Is Creating New Structural Earnings Growth
President Trump’s proposed $1.5 trillion defence budget for fiscal year 2027, a jump from the roughly $900 billion authorised for 2026 is creating a structural earnings tailwind for defence and aerospace stocks that is largely independent of oil prices, the economic cycle, or the Iran conflict’s duration. NATO allies have committed to spending 5% of GDP annually on core defence requirements by 2035. Canada has committed $81.8 billion over five years. As 24/7 Wall St.’s March 16 market analysis documents, RTX, Northrop Grumman, and Lockheed Martin were all higher in premarket trading as the conflict continued. Defence stocks represent a multiyear structural growth story that partially insulates the index from the macro headwinds facing consumer and technology sectors.
Investors seeking exposure to the defence sector through digital assets can explore defence linked tokens and macro hedge assets on MEXC. Read MEXC’s expert analysis on how macro events and geopolitical shocks affect crypto prices for a detailed breakdown of sector rotation and positioning strategies.
3. What Could Actually Break the S&P 500 From Here
3.1 Oil Duration: The Single Most Important Variable
The S&P 500’s resilience is built on a tacit market assumption: that the Iran conflict will be relatively short lived and oil will eventually retreat. As 24/7 Wall St.’s March 6 market analysis noted, Trump declared ‘there’s no deal to end the war without unconditional surrender’, signalling that the conflict could be protracted. ING has warned that prolonged Strait of Hormuz disruptions could push oil to record highs surpassing 2008 levels. If oil stays above $100 through May and June, the inflation implications for Q2 2026 corporate earnings guidance to be reported in April become significantly more damaging than current forecasts anticipate.
3.2 The Earnings Season Test
Q1 2026 earnings season begins in mid April, roughly six weeks after the Iran conflict started, giving enough time for oil’s impact to transmit into corporate cost structures. Airlines, consumer discretionary retailers, food companies, and industrial manufacturers all face direct exposure to higher energy and transportation costs. The critical risk is not the Q1 headline numbers themselves which will largely predate the full oil shock but the Q2 and Q3 guidance that management teams will provide alongside them. A wave of guidance cuts in April would force analysts to revise their record $328.80 per share forward earnings estimate downward, which would push the forward P/E back above 22x at current prices and create genuine selling pressure.
3.3 The 200-Day Moving Average Support Level
The S&P 500’s 200-day moving average near 6,601 is the most critical technical level in global markets right now. It has been tested multiple times during the Iran conflict selloff and held each time attracting significant institutional buying whenever price approaches that level. A decisive, sustained break below 6,601 particularly if confirmed by a VIX spike above 35 would signal that the market’s resilience is cracking and that a deeper correction toward 6,400 to 6,500 is possible. Conversely, a sustained recovery above the prior pivot at 6,882 would signal the market has fully absorbed the Iran shock. As of March 17, 24/7 Wall St.’s latest market update notes the S&P 500 is now below its 50-day moving average as well — adding another layer of technical vulnerability that investors should monitor closely.
4. Which Sectors and Stocks Are Winning Right Now
4.1 Energy: The Clearest Beneficiary
For traders who want to understand how to read S&P 500 technical signals and apply them to crypto market timing, MEXC’s guide to reading stock market charts for crypto investors bridges the gap between equity technical analysis and crypto trading.
US energy producers are generating record profit margins at $100+ per barrel oil. Exxon Mobil surpassed $157 after Barclays and Piper Sandler raised their price targets. Occidental Petroleum hit a one year high of $59.15 on similar analyst upgrades. ConocoPhillips, Valero Energy, and Marathon Petroleum have all seen meaningful price appreciation since February 28. CF Industries, the world’s largest ammonia producer hit an all time high, up 67.6% year to date, as rising natural gas prices drove fertiliser demand. For investors seeking energy sector exposure through crypto adjacent assets, tokenised commodity products and energy sector tokens provide an accessible entry point.
4.2 Defence and Aerospace
Defence contractors are one of the structural winners of the current geopolitical environment, with earnings growth prospects that extend years beyond the Iran conflict’s resolution. As CNBC’s analysis of defence stocks surging on the Iran war shows, Lockheed Martin, RTX, Northrop Grumman, and L3Harris all have forward order books that will benefit from accelerating global defence budgets regardless of how quickly the current conflict ends. This is a multiyear compounding story driven by structural policy decisions – NATO’s 5% GDP commitment, Trump’s defence budget expansion, and Asia’s accelerating military investment, not a short term trade.
4.3 Technology: Resilient but Bifurcated
The technology sector is telling two very different stories simultaneously. The Magnificent Seven names – Nvidia, Microsoft, Apple, Alphabet, Amazon, Meta, and Tesla have shown relative resilience and been actively bought as quality safe havens within equities. Nvidia in particular has benefited from the GTC 2026 conference narrative, with Jensen Huang’s $1 trillion orders announcement providing a powerful fundamental catalyst. Meanwhile, software stocks more broadly have been brutal down significantly from their recent highs as elevated interest rate expectations compress the growth multiples that software valuations depend on.
For investors wanting to track Nvidia’s performance and AI sector momentum, MEXC’s Nvidia price page provides real time data and market analysis.
5. How to Position Your Portfolio Right Now
5.1 Do Not Panic Sell a 3% Correction
The historical evidence on this point is unambiguous. Investors who sell into geopolitical shocks almost always miss the subsequent recovery. A 3.2% decline from an all time high, after three weeks of war, $100 oil, and genuine stagflation fears is not a catastrophic market response, it is a rational repricing of risk. The 70%+ of institutional investors remaining positioned long in the S&P 500 are not being reckless. They are applying a century of historical data showing that patience consistently outperforms panic in geopolitical crises.
The intelligent approach is sector rotation rather than wholesale exit. Reduce exposure to the most vulnerable areas – software stocks at elevated multiples, airlines with direct fuel cost exposure, consumer discretionary retailers with thin margins and reallocate toward energy producers, defence stocks, and cash rich technology leaders. MEXC’s guide to sector rotation strategies explains how to apply this framework to your crypto and digital asset portfolio.
5.2 Watch the 200-Day Moving Average and Oil Price Together
These two indicators: the S&P 500’s 200-day moving average and the WTI crude price are the two most important data points for equity investors in the current environment. If the 200-day MA at 6,601 holds and oil retreats below $90, the bull case reasserts strongly. If the 200-day MA breaks decisively and oil stays above $100, the picture changes fundamentally and a more defensive posture is warranted. Monitor both daily.
5.3 Use Crypto Markets as a Real-Time Macro Barometer
Bitcoin and the broader crypto market trade 24 hours a day, seven days a week providing real time price discovery on risk sentiment even when stock exchanges are closed. Since the Iran conflict began, Bitcoin has broadly tracked equity market sentiment, making it a useful overnight barometer for how institutional risk appetite is developing before US markets open. Monitoring Bitcoin’s response to geopolitical news particularly on weekends when equities cannot react can provide early signals about Monday morning market direction. Monitor Bitcoin and crypto as a real time macro sentiment indicator on MEXC.
6. How to Trade US Market-Linked Assets on MEXC
MEXC provides access to a wide range of assets that allow investors to gain exposure to US market themes including crypto tokens linked to technology companies, AI infrastructure, energy sector performance, and macro trends. Here is how to get started:
1. Create a free MEXC account – Visit mexc.com and register using your email address or phone number. Verification takes under two minutes. Complete KYC to unlock full trading access.
2. Deposit funds – Fund your MEXC wallet using USDT, BTC, ETH, or fiat currency via bank transfer or credit card. MEXC supports a wide range of deposit methods by country.
3. Navigate to the asset you want to trade – Use the search function to find specific tokens. For Nvidia exposure, search NVDA. For Bitcoin as a macro hedge, open the BTC/USDT pair. For energy sector tokens, filter by category in the Markets tab.
4. Choose your order type – Use a market order for immediate execution at the current price, or a limit order to enter at a specific target. MEXC offers spot trading with maker fees as low as 0% and competitive futures trading fees.
5. Set risk management levels – In a volatile macro environment, always set a stop loss level before entering any position. MEXC’s trading interface supports stop loss and take profit orders natively. Never risk more than you can afford to lose.
6. Monitor macro developments – Set price alerts on MEXC for your key levels. The S&P 500’s 200-day MA at 6,601, WTI crude at $90 and $80, and the VIX at 30 and 35 are the most important threshold levels to track right now.
Ready to start? Sign up on MEXC today and access Nvidia, Bitcoin, and thousands of digital assets with some of the lowest trading fees in the industry.
Frequently Asked Questions (FAQ)
Q1: Why has the S&P 500 not crashed despite $100 oil and a war?
Several structural factors have prevented a more severe selloff. First, Wall Street earnings forecasts have remained stubbornly strong, S&P 500 aggregate forward earnings hit a record $328.80 per share as of mid March 2026 according to Yardeni Research, giving the market a fundamental anchor against macro fear. Second, US energy independence means higher oil prices redistribute wealth within the domestic economy rather than draining it abroad, energy stocks’ gains partially offset other sectors’ losses. Third, institutional investors are rotating within equities rather than fleeing them, buying cash rich tech giants as safe havens. Fourth, the historical pattern of geopolitical shock recoveries is well known to professional investors and keeps them from selling into fear. For the complete institutional analysis of S&P 500 resilience drivers, read 24/7 Wall St.’s March 12 live market update on oil and institutional buying patterns.
Q2: What is the most important technical level to watch on the S&P 500?
The S&P 500’s 200-day moving average near 6,601 is the most critical technical support level in global equity markets right now. It has been tested and defended multiple times during the Iran conflict selling. A decisive, sustained break below 6,601 particularly if accompanied by a VIX spike above 35 and continued oil above $100 would signal a more serious breakdown and likely trigger further institutional selling. A recovery above the 6,882 prior pivot would confirm the market has absorbed the Iran shock. A breakout above 7,000 would likely trigger a short squeeze toward 7,200. As of March 17, the S&P 500 is also trading below its 50-day moving average a secondary resistance level that adds to the technical vulnerability in the near term. Track S&P 500 movements in real time via MEXC’s live market data dashboard.
Q3: Which stocks and sectors are best positioned right now?
The three sectors with the strongest fundamental tailwinds in the current environment are energy producers, defence contractors, and cash rich technology. US energy producers: Exxon, Chevron, ConocoPhillips, Occidental, and the major shale operators are generating record margins at $100+ per barrel oil. Defence contractors: Lockheed Martin, RTX, Northrop Grumman, L3Harris benefit from structural multiyear budget expansion regardless of how quickly the Iran conflict resolves. Cash rich tech giants: Nvidia, Microsoft, Apple have been treated as quality safe havens within equities. The sectors most exposed to downside are airlines, consumer discretionary retailers, software stocks at elevated valuations, and any company with significant unhedged fuel cost exposure.
Q4: How does the S&P 500’s performance affect crypto markets?
The S&P 500 and crypto markets have shown a significant correlation during the Iran conflict period – Bitcoin and major crypto assets broadly tracking equity sentiment, falling when stocks fell and recovering when stocks bounced. This correlation makes S&P 500 performance a useful proxy for overall risk appetite, which in turn drives short term crypto price action. When the S&P 500 is holding above its 200-day moving average and institutional investors are buying dips, crypto markets tend to stabilise. When equity markets break key support levels and fear spikes, crypto assets typically see amplified selling due to their higher volatility. Understanding this relationship allows crypto investors to use equity market signals as part of their trading framework. Read MEXC’s expert analysis on how geopolitical events and equity market moves affect crypto prices.
Q5: Should retail investors buy the S&P 500 dip right now?
This depends entirely on your time horizon, risk tolerance, and portfolio context. For long term investors with a multiyear horizon, the historical evidence strongly suggests that buying during geopolitical selloffs when the S&P 500 is 3% to 5% off its highs and news sentiment is maximally negative has been a consistently sound strategy. For short term investors, the near term picture is more uncertain: oil duration, Q1 earnings guidance, and the Fed’s credibility all represent genuine risks that could push the index through its 200-day moving average support. A dollar cost averaging approach, buying in tranches over weeks rather than in a single entry reduces the risk of poor timing while still participating in the medium term recovery that historical data strongly suggests will follow. Always invest only what you can afford to lose, and consult a qualified financial advisor before making significant investment decisions. Start building your investment portfolio on MEXC with real time data and competitive fees.
Conclusion
The S&P 500 is telling a story of remarkable resilience in the face of genuinely serious macro headwinds. Three weeks of war, $100+ oil, stagflation fears, a paralysed Federal Reserve, and 92,000 jobs lost in February and the index is just 3.2% below its all time high.
Investors who want to stay ahead of macro driven market moves can track how equity market signals translate into crypto market opportunities. Read MEXC’s 2026 top crypto investment guide for the AI and macro era for a detailed breakdown of positioning strategies in volatile markets.
That resilience has structural foundations: record forward earnings estimates, US energy independence creating an internal hedge, institutional rotation into quality rather than exit, the historical pattern of geopolitical shock recoveries, and a multiyear defence spending boom providing structural earnings growth.
But resilience is not the same as immunity. The 200-day moving average at 6,601 is the line in the sand. The S&P 500 has defended it repeatedly but each test represents a potential failure point. If oil stays above $100 through summer, if Q1 earnings guidance disappoints in April, or if the Federal Reserve’s credibility comes under genuine stress, the foundations of the current resilience could crack.
The intelligent approach is not to make a binary bet on ‘crash’ or ‘recovery.’ It is to understand which sectors benefit from the current environment, maintain disciplined risk management around key technical levels, and position for a range of outcomes with appropriate position sizing. The market is stressed but not broken and in every previous episode where that has been true, patience has ultimately rewarded investors.
CTA: Ready to navigate volatile markets with confidence? Access Nvidia, Bitcoin, energy tokens, and thousands of digital assets on MEXC for real time market data.
Disclaimer: This article is for educational purposes only and does not constitute financial or investment advice. All investments carry significant risk, including possible loss of principal. The information in this article reflects market conditions as of March 17, 2026. Past performance is not a reliable indicator of future results. Always conduct your own research and consult a qualified financial advisor before making any investment decisions.
