Nasdaq, S&P 500 Mark Record Closes Amid Semiconductor Surge

By Liliana Orozco | May 26, 2026, 4:28 PM

Stocks kicked off the holiday-shortened week mixed as investors monitored developments between the U.S. and Iran. Cooling Treasury yields and strength in the tech sector boosted sentiment, sending the S&P 500 and Nasdaq to fresh record closes. Micron Technology (MU) stole the spotlight with a sharp rally that lifted its market capitalization above $1 trillion for the first time ever. The Dow, meanwhile, snapped its three-day win streak with a triple-digit loss.

Continue reading for more on today's market, including:

Nike stock flashing historically bearish sentiment signal.
Intuitive Machines joined today's space rally.
Plus, SPX levels to watch, unpacking holiday weekend data, and a short squeeze stock pick.

5 Things to Know Today

Federal judges block Alabama's congressional map, citing discrimination against Black voters before midterm elections. (The New York Times)
U.S. and Armenia sign strategic partnership deal as Russia pressures Yerevan over growing Western ties. (Reuters)
2 lesser known trends we're following this week.
Memorial Day market data you don't want to miss.
Nuclear energy stock with short squeeze potential.

WTI Slips from Friday's Close

Oil prices fell Tuesday amid geopolitical uncertainty. June-dated West Texas Intermediate (WTI) shed 2.8% from Friday's close to settle at $93.89 per barrel.

June-dated gold futures added 0.1% to settle at $4,527.90 per ounce.

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+19.29%

Micron Technology Inc

Latest News

44 min	This Potato Tycoon Knew About Micron Before You Did MU +19.29% The Wall Street Journal
49 min	How a stock market 'melt-up' could carry the S&P 500 to 8,000 or beyond MU +19.29% MarketWatch
1 hour	Memory chip prices to remain high as Micron surges, expert says MU +19.29% Reuters Videos
2 hours	S&P 500, Nasdaq hit record closing highs on AI optimism, Micron joins $1 trillion club MU +19.29% Reuters
2 hours	The Idaho Chip Maker That Doubled to $1 Trillion in 48 Days MU +19.29% The Wall Street Journal
2 hours	Peace deal hopes boost Wall Street stocks despite latest US strikes MU +19.29% AFP
2 hours	Nasdaq, S&P 500 Mark Record Closes Amid Semiconductor Surge MU +19.29% Schaeffer's Research
2 hours	S&P 500 and Nasdaq post fresh records as memory-chip stocks surge; Dow ends slightly lower MU +19.29% MarketWatch
3 hours	Micron's valuation hits $1T, nearly tied with Eli Lilly & Berkshire MU +19.29% Yahoo Finance Video
3 hours	Stocks Rise Toward Record as Iran Peace Hopes Hold: Markets Wrap MU +19.29% Bloomberg
3 hours	ETFs Are Hotter Than Stocks. Not Even SpaceX Will Change That. MU +19.29% Barrons.com
4 hours	Micron joins the $1 trillion club as AI memory rally outruns megacaps: Chart of the Day MU +19.29% Yahoo Finance
4 hours	Micron Smashes $1 Trillion Market Cap After UBS Triples Price Target MU +19.29% GuruFocus.com
4 hours	$1 Trillion Micron, Marvell Lead the AI Rally to Start the Week. Heres What Wall Street Is Watching Next MU +19.29% Investopedia
5 hours	The memory chip fund that has surged over 110% since early April keeps ripping higher as Micron soars MU +19.29% MarketWatch

Nasdaq, S&P 500 Mark Record Closes Amid Semiconductor Surge

5 Things to Know Today

WTI Slips from Friday's Close

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