3/31 US Stock Market - Rally Fueled by Hopes of Ending Iran War
March 31, 2026 Market Analysis
## 1. What Happened Today? – A Day of "The War Might Actually End"
Today (March 31, US time) the US stock market experienced the strongest 'relief rally' of the year.
- Major Indices: The Dow surged over 1,100 points, posting its strongest gain since last spring, and the S&P 500 jumped nearly 3%.(apnews.com)
- Sectors: 10 out of 11 sectors gained, with technology (+3.58%), consumer cyclical (+3.06%), and industrials (+3.03%) leading. Only energy declined at -1.16%.
The biggest reason is a signal that the Iran war won't escalate further and negotiations might actually become possible. After reports emerged that President Trump told his staff he's willing to reduce military action, market fear instantly transformed into 'relief'.(apnews.com)
In simple terms,
> Investors who were hovering near the emergency exit asking "What if the war gets worse?"
> Are now sitting back down saying "It looks like we've avoided the worst for now."
Why does this matter?
- Signal that war could ease → International oil prices stabilize → Expectations emerge that transportation, aviation, and consumption-related companies' cost burdens will decrease.
- When war risk decreases, it becomes easier for money to flow back into risk assets like stocks and crypto rather than 'safe assets' like cash and bonds.
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## 2. Three Major Themes Driving Today's Market
### (1) Technology and Semiconductors: "AI Investment Continues" + War Fear Eases
Technology stocks, especially semiconductors and AI-related names, were the clear stars of today's market.
- Sector Overall: Technology sector surged +3.58%
- Key Names:
- Marvell Technology (MRVL) +12.54%
- ON Semiconductor (ON) +11.25%
- SanDisk (SNDK) +10.85%
- Arm Holdings (ARM) +10.20%
- Monolithic Power (MPWR) +9.30%
The background involves two factors.
1. The AI investment story remains alive
- News that Nvidia is investing $2 billion in Marvell and forming a partnership was especially seen as a signal that "AI infrastructure investment will continue long-term".(apnews.com)
- From investors' perspective, expectations grew that "companies making critical AI components won't see their order books dry up anytime soon."
2. War easing expectations → Money flows back into high-risk tech stocks
- Recently, concerns about the Iran war and Strait of Hormuz blockade caused money to flow into energy and defense, with high-valuation tech stocks taking some hits.(apnews.com)
- Today, as perceptions spread that "we can avoid the worst-case scenario," strong buying emerged to repurchase tech stocks that had fallen significantly.
> By analogy, a few days ago it was "Let's buy umbrellas and rain boots (energy and defense) to prepare for heavy rain,"
> But today it's become "The rain is letting up, I can put my sneakers back on and go out (repurchasing tech and growth stocks)."
In longer-term perspective?
- On a 10-day and 30-day basis, the technology sector is still down -3.30% and -2.84%, having been quite pressured over recent weeks.
- On a 120-day (roughly 6-month) basis it's around -0.65%, so the long-term trend isn't completely broken, but it represents a strong rebound from a deeply adjusted short-term period.
Why does this matter to you?
- If you already held AI and semiconductor-related positions, today's rebound may signal that the recent adjustment has finished catching its breath and is repositioning. There's significance in that.
- However, one sharp rally doesn't guarantee a trend reversal, so it's safer to view this as a 'volatility bounce' in a period with many variables like war, interest rates, and earnings announcements.
> Volatility: A state where stock price movements are large. In simple terms, it's a market that rocks up and down like a roller coaster.
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### (2) Airlines, Cruises, and Industrials: Benefiting from "Oil Price Stabilization + War Tensions Easing"
Today, consumer cyclical and industrial sectors performed almost as strongly as tech stocks.
- Consumer Cyclical: +3.06%
- Carvana (CVNA) +8.52%
- Carnival Cruise (CCL) +7.71%
- MercadoLibre (MELI) +6.78%
- Industrials: +3.03%
- Comfort Systems (FIX) +8.31%
- United Airlines (UAL) +8.05%
- GE Vernova (GEV) +6.80%
What these names have in common is they are "companies whose earnings improve significantly as long as the economy doesn't deteriorate too much."
1. Expectations for oil price stabilization
- International crude oil that surged due to Iran war and Strait of Hormuz risk is catching its breath as war easing expectations emerge.(apnews.com)
- Airlines, cruise lines, and transport companies have high fuel cost ratios making them very sensitive to oil prices. When oil prices show signs of declining, it's immediately reflected in stock prices.
2. Psychology recovers with "It won't be the worst possible recession"
- If war escalates further and energy prices keep surging, consumption and corporate investment will ultimately contract significantly.
- Today, as expectations emerge that "the war could be managed at a controllable level," buying activity appeared for cyclical stocks that had been sold off preemptively.
Looking at the longer flow
- Consumer cyclical is down -9.48% on a 30-day basis, and industrials are down -8.55%, having undergone quite significant adjustments over the past month.
- Today's rally is heavily characterized by 'oversold bounce.'
> Oversold bounce: When something falls so much that it bounces back up on that basis alone. It's similar to when you press down a fence too hard and it springs back up when you release it.
Why does this matter to you?
- If businesses close to real consumption like travel, airlines, automobiles, and online shopping come back to life, this could be a somewhat positive signal for actual economic sentiment.
- However, since 10-30 day returns are still significantly negative, it's premature to say "now there's complete recovery" based on today's one-day bounce.
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### (3) Finance and Crypto-Related Stocks: Risk Asset Recovery + Bitcoin Holding Ground
The financial sector gained +2.22%, participating in overall market gains. What stood out within it were crypto-related stocks.
- Coinbase (COIN): +8.29%
- Robinhood (HOOD): +6.37%
- Associated crypto market:
- Bitcoin held the 66,000-67,000 dollar range, showing sideway consolidation after recent declines.(ad-hoc-news.de)
The direct catalyst for Coinbase's gain was the overall recovery of risk assets following war easing expectations.(za.investing.com)
> Risk assets: Assets whose prices move significantly based on economic conditions and sentiment. Stocks and crypto are typical examples.
Names like Coinbase and Robinhood are exposed to both stock trading and crypto trading,
- "War risk easing → expectations for stock trading recovery" and
- "Bitcoin holding ground instead of crashing → crypto trading could be more resilient than expected" were simultaneously reflected.
Crypto itself is not yet in a 'bull market'
- For the entire first quarter, Bitcoin is down about 23%, and March overall was mostly in a consolidation range.(ad-hoc-news.de)
- Today's recovery is "holding ground pretty well amid war and interest rate variables" level, making it more reasonable to view it as partial participation in broader global risk asset relief rally rather than an independent crypto rally.
Why does this matter to you?
- For investors playing both stocks and crypto, today was a day of viscerally experiencing how war and macro events shake both markets simultaneously.
- Rather than viewing "crypto as a completely different world from stocks," it's more realistic to understand it as an asset that rises when risk appetite (willingness to assume risk) improves.
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## 3. Why Did Energy Decline Alone? – "It Rose Too Much, and Today It's Catching Its Breath"
Energy was the only sector that declined today at -1.16%.
- Energy has been the market's strongest sector with 30-day performance of +16.09% and 120-day performance of +38.39%.
- With international oil prices breaking above $100 due to war and Strait of Hormuz blockade concerns, refining, gas, and energy infrastructure companies have shown consecutive strength.(en.wikipedia.org)
Today, amid perceptions that "tech and consumer stocks look cheaper now,"
- Profit-taking from energy emerged, and
- Part of those proceeds shifted to technology, consumer, and industrial stocks.
> In simple terms, energy stocks have risen so much they're "the satisfied side,"
> While tech and consumer stocks have fallen so much they're "the hungry side."
> Today investors took a plate away from the satisfied side and put more side dishes on the hungry side.
Why does this matter to you?
- If you significantly increased energy exposure, you need to keep short-term adjustment risk in mind.
- Conversely, if you have almost no energy weighting, this adjustment could be a long-term re-entry opportunity. However, you should account for the fact that war and supply disruption issues remain ongoing, making this a highly volatile sector.
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## 4. Where Does Today's Movement Fall in the Bigger Picture?
### (1) 10-Day and 30-Day: Still in 'Rebound Attempt' Stage
- 10-day basis: Only 3 out of 11 sectors are positive. (Only materials, energy, and financials are healthy)
- 30-day basis: Only 2 out of 11 sectors (energy and materials) are positive, while sectors close to real economy like consumer cyclical (-9.48%), industrials (-8.55%), and consumer staples (-8.83%) remain significantly pressured.
→ Sectors that rose sharply today (technology, consumer cyclical, industrials) are naturally viewed as "strong technical rebounds within a downtrend."
> Technical rebound: Not a fundamental change in company earnings or fundamentals,
> but a rebound driven by short-term supply demand due to "having fallen too much."
### (2) 120-Day: Energy Strong, Everything Else Mixed
- On a 120-day (roughly 6-month) basis, energy (+38.39%) and materials (+23.67%) are overwhelmingly strong,
- While technology (-0.65%), communication (-6.87%), and financials (-5.89%) are in adjustment or consolidation ranges.
→ The big theme of war and rising energy prices hasn't ended yet,
and today can be interpreted as position adjustment from "a day when fear receded somewhat" within that.
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## 5. Investor Checkpoints for Today
1. War news = immediately translates to energy, transport, and tech stocks
- War escalates → Energy prices rise → Aviation, cruise, manufacturing costs increase → Tech and consumer adjustments
- Easing signals → Energy catches breath → Tech, consumer, industrial rebound
Today was a textbook example of the latter.
2. Rather than chasing one day's rally, also watch the 10-30 day flow
- Since technology, consumer, and industrial are still negative on 30-day performance, you need to watch whether this is "the start of a rebound or a short-term bounce before falling again."
3. Crypto and stocks stand on the same 'risk psychology'
- Like how Coinbase and Robinhood stock prices and Bitcoin movements moved together today,
- Remember that macro issues like war, interest rates, and inflation are common backgrounds simultaneously shaking both markets.
> Macro (macroeconomics): Large variables that move the entire economy rather than individual companies, such as interest rates, inflation, war, and growth rates.
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## 6. Closing: Today in One Line
> Amid signals that "the Iran war might not go all the way,"
> Money that had been sitting out in fear rushed back into technology, consumer, industrials, and even crypto-related stocks all at once.
> However, energy entered a pause, and by 10-30 day flow, it's still in 'rebound attempt' stage.
This content was written for informational purposes only and does not recommend investment in any specific stocks or assets.
Source: https://nextinvest.org/ko
