Bullstory
May 26, 2026

S&P500· Nasdaq closes at a record, Micron's market capitalization tops 1 trillion dollars

26 and 27 in U.S. markets, the S&P500 and Nasdaq1 recorded record closing highs. Micron's market capitalization topped a trillion dollars, lifting shares in the sector.


S&P500· Nasdaq closes at a record, Micron's market capitalization tops 1 trillion dollars

In U.S. markets, the S&P500 and Nasdaq recorded closing highs. Expectations related to artificial intelligence were cited as a factor behind the gains in both indexes. Some technology stocks also posted strong gains during the same period.

WTI crude oil prices fell amid hopes for peace negotiations with Iran. News of the decline in oil prices affected returns in the energy sector. Market participants reacted sensitively to geopolitical news.

Micron, a memory chipmaker, saw its market capitalization exceed 1 trillion dollars. Changes among the companies with the largest market capitalizations pushed some of the previous top-ranked companies down. News of Micron's expanding market capitalization came alongside a rise in its share price.

Micron's share price rose after its market capitalization reached1trillion dollars, according to news of the milestone. Trading volume appeared to increase in response from investors. The share-price rise drew market attention alongside the company's expanding market capitalization.

This week's stock-market movement was reported as reflecting both expectations of demand related to artificial intelligence and a revaluation of the semiconductor sector. Record highs for indices coincided with changes in individual companies' market capitalizations. The market also factored in geopolitical news and performance indicators from individual industries.

26Related reports published on and27covered changes in indices and individual stocks' market capitalizations at the same time. Each report summarized the market response after the close of trading. Additional disclosures can be confirmed through official announcements by the individual companies.

Sources: Reuters,Yahoo Finance

Bullstory synthesized this report from the linked sources. AI may have assisted the writing process. Check the original reports for factual confirmation.