Why is United Microelectronics Corporation stock down today?

September 23, 2026

United Microelectronics Corporation

UMC · NYQ · USD

$24.68

▼ 1.09 (4.23%)

vs. prev. close $25.77

Last updated Sep 23, 2026 20:00

Intraday Chart — 5-min intervals

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AI Summary

UMC · less than a minute ago

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United Microelectronics Corporation trades lower by 4.23% with investors watching MT Newswires

The stock is at $24.68, a 4.23% move down versus the prior close of $25.77. Two headlines stand out today: "United Microelectronics Insider Sold Shares Worth $1,630,000, According to a Recent SEC Filing" and "GlobalFoundries Drives Gross Margin Expansion: Can the Momentum Last?". Taken together, the news tone looks positive.

Market context matters here: S&P 500: -0.8%, Nasdaq: -1.1%, Dow Jones: -0.7%, Shanghai: -0.3%, Hang Seng: -0.8%, leaving the overall tape under pressure.

Use this as a starting point for research, not as a trading recommendation.

Key Factors

1MT Newswires: United Microelectronics Insider Sold Shares Worth $1,630,000, According to a Recent SEC Filing

2Zacks: GlobalFoundries Drives Gross Margin Expansion: Can the Momentum Last?

3Zacks: Can GFS' Marvell Deal for SiGe Capacity Expansion Accelerate Growth?

4Broad market: S&P 500: -0.8%, Nasdaq: -1.1%, Dow Jones: -0.7%, Shanghai: -0.3%, Hang Seng: -0.8%

Auto-generated analysis · Not financial advice

less than a minute ago

📰Recent News

5 neutral3 positive

⚠️ Disclaimer: The information on this page is for informational purposes only and does not constitute financial advice. AI-generated summaries may be inaccurate. Always conduct your own research and consult a licensed financial advisor before making any investment decisions. Past performance is not indicative of future results.

🌐Market ContextRisk-Off 📉

S&P 500

-0.75%

Nasdaq

-1.13%

Dow Jones

-0.68%

Shanghai

-0.34%

Hang Seng

-0.83%

Nikkei 225

+1.38%

FTSE 100

-0.03%

Nifty 50

+0.14%

DAX

-0.66%

OMX Stockholm

-0.57%

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