The major US stock indices opened Monday higher, led by the Dow Jones Industrial Average, as WTI crude fell more than $5.40 a barrel on signs of US-Iran de-escalation. Crypto Briefing puts the S&P 500's market-capitalization gain at the open at $675 billion. Morgan Stanley strategists say the index now resembles its early-to-mid 2021 setup.
The Dow Jones Industrial Average leads the gains, up 1.23%, while the S&P 500 trades 0.81% higher. The Nasdaq is up roughly 242 points, or 0.95%, after being up more than 300 points in premarket trading. Investors are encouraged by easing geopolitical tensions, sharply lower oil prices, and hopes that the recent flare-up in the Middle East may be giving way to renewed diplomacy.
Crude's retreat drives the move
WTI crude is down more than $5.40 a barrel, extending its retreat as traders unwind the geopolitical risk premium built into prices over the past two weeks. Reports suggesting a pause in US military operations against Iran, together with indications that Tehran is also refraining from further escalation, have fueled optimism that the conflict may not spread further.
Because of this, lower oil prices ease inflation concerns, reduce costs for businesses and consumers, and lessen the risk that higher energy prices could complicate the Federal Reserve's policy outlook. Airlines, transportation companies, retailers, and other energy-sensitive sectors have benefited from the decline, while investors have rotated back into growth stocks after last week's risk-off tone.
The S&P 500 adds $675 billion at the open
The S&P 500 added $675 billion in market capitalization at the open on July 27, 2026, according to Crypto Briefing. Two earlier notable single-session moves in 2026 were a $560 billion gain on a 0.83% open and a $420 billion move on a 0.7% session, making Monday's the largest of the three.
Across mid-to-late July 2026, the index has traded between 7,500 and 7,600. It posted 23 all-time highs through June alone, capping a second quarter that delivered a 15.2% gain. Next come earnings from Microsoft, Meta, Amazon, and Apple, and a Federal Reserve meeting at which the expectation is that rates stay put.
Morgan Stanley reads a quality rotation
Strategists at Morgan Stanley led by Michael Wilson wrote in a note published Monday that the index resembles the way it looked five years ago. According to Morgan Stanley strategists: "The current setup resembles early-to-mid 2021, when leadership shifted toward quality".
High-quality megacap stocks make up about 42% of the S&P 500, while low-quality stocks represent just under one-third of the index. The bank listed Apple, Micron Technology and Coca Cola as high-quality stocks that outperform most other companies in their respective sectors.
However, a decline toward the 7,000 mark is possible if the war in Iran escalates or if the Federal Reserve decides to raise interest rates at its meeting Tuesday and Wednesday, the strategists wrote. They expect the quality rotation to support the strength of the index and even help to broaden participation.
Sources: Investinglive, Crypto Briefing, MarketWatch
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