Research brief
United Microelectronics closed the week of 3 July at $24.54, down 4.1%, while still up 24.6% over four weeks and 152.0% over 12 weeks. The stock remains 87.4% above its weekly Trend Line and 200.7% above Sharemaestro Fair Value, but volume cooled to 67.1 million shares, or 0.9x the 13-week average, leaving confirmation less forceful than the prior week’s 116.9 million-share print.
- UMC’s weekly Trend Signal remains active, with a 31-week active streak and 46 active weeks across the past 52.
- The stock is positioned high in its annual range at 80.3%, but it is still 15.3% below the 52-week high of $28.96.
- Technology was broadly steady for the week, while US Semiconductors fell 3.25%; UMC’s 4.1% decline was slightly weaker than its industry average.
- Short-term and quarterly Relative Strength remain strong, with UMC ranking near the top of its semiconductor group on four-week and 12-week returns.
- Activity pressure is still positive at 1.64, but it has faded by 17.5% over four weeks, and the latest signal state shows no fresh buy confirmation.
A powerful semiconductor move meets a participation test
United Microelectronics’ latest weekly print was mixed rather than broken. The Taiwan-based foundry closed at $24.54, down 4.1% for the week, after a 24.6% four-week advance and a 152.0% 12-week move. That keeps the stock among the stronger US-listed semiconductor names on medium-term performance, even as the latest week showed some fatigue.
The share price remains well above the $13.09 weekly Trend Line, a premium of 87.4%, and far above Sharemaestro Fair Value at $8.16. That distance confirms strong demand, but it also raises the bar for fresh upside evidence. With the close 15.3% below the 52-week high of $28.96, the next phase is less about whether the prior move was strong and more about whether buyers can support the upper part of the range after a cooling week.
Sector context is supportive, but the industry week was soft
UMC sits in Technology and the US Semiconductors industry, an area where breadth is still healthier than the latest weekly return suggests. Technology averaged a small 0.1% weekly gain, with 66.0% of names in active weekly trends, 75.0% showing positive Market Dynamics, and 54.0% with positive Relative Strength. Semiconductors were weaker on price, averaging a 3.25% weekly decline, but breadth stayed constructive: 84.1% trend active, 88.4% positive on Market Dynamics, and 65.2% positive on Relative Strength.
Against that backdrop, UMC’s 4.1% weekly loss was not an outlier, but its four-week return ranked second in the semiconductor group and fourth on a 12-week view. Astera Labs was stronger on both a one-week and 12-week basis, while ASE Industrial posted a positive 4.1% week. Intel and Allegro also fell, underscoring that the semiconductor pullback was fairly broad rather than company-specific.
Trend Signal stays active, while pressure cools
The Sharemaestro read is balanced. UMC’s Trend backdrop is active, supported by a 31-week active streak and 88.5% trend breadth over the past year. Price remains well above the regime line, and Relative Strength is positive at 114.56, up 22.8% over four weeks. That preserves the constructive medium-term profile.
The caution is in confirmation. Activity pressure is positive at 1.64, but it has eased from recent readings and is down 17.5% over four weeks. The signal state shows no fresh buy, while the risk file flags two recent reversal markers in the smart-money tape. In other words, the trend is intact, but urgency has moderated after a large advance.
Volume and risk now matter more near the upper range
Volume was the clearest soft spot in the week. The latest 67.1 million shares were below the 13-week average of 78.7 million, giving a 0.9x participation ratio. That is still above the 52-week average of 50.1 million, but it was a clear step down from the prior week’s 116.9 million-share print, which came with a 6.2% gain.
Risk is also elevated versus UMC’s own base rate. Thirteen-week weekly-return volatility is 8.8%, above the 52-week level of 6.9%. The up/down split over the past year is close at 27 positive weeks versus 25 negative weeks, though the average gain of 7.5% is larger than the average loss of 3.0%. Watch next for whether the stock can stabilise above the rising Trend Line while activity pressure stops fading. A move accompanied by volume above 1.5x would carry more weight than another low-participation push.
Research note
This article is for educational market research only and is not financial, investment, trading, tax, or legal advice. Sharemaestro does not make buy, sell, or hold recommendations.
Source and attribution
Source: Sharemaestro. Canonical article: https://sharemaestro.com/news/umc-152-quarter-volume-confirmation-july-2026/.
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