Guidance was the key catalyst. Micron projected fiscal Q4 2026 revenue of approximately $50 billion, far above the Wall Street consensus of around $43.2 billion . The company also guided to adjusted EPS of about $30–$32, compared to the $24.30 consensus estimate . CNBC reported that the results "beat Wall Street forecasts by a wide margin" and "helped push U.S. stock futures higher and improving sentiment across AI-exposed tech names" .

European Semiconductor Stock Performance

The Micron beat triggered a synchronized rally across European chip names on June 25:

• ASML rose 4.5% as part of the broader sector move . Its U.S.-listed shares closed at $1,213.56 on June 25, up 15.74% in a single session .
• ASM International NV surged 5.5% to €1,022, recovering sharply from a two-day decline that had pushed shares from above €1,000 to a previous close of €969.20 .
• Infineon gained 3.1% and STMicroelectronics rose 5.1% .
• The broader Stoxx Europe 600 notched a record high close, with the AI rally triggered by Micron's and Qualcomm's strong forecasts lending early-session support .

Analyst Upgrades Before and After Micron's Report

A cluster of major Wall Street banks had already raised price targets on ASML in the weeks leading up to Micron's earnings, amplifying the positive reaction when the results landed:

• June 4: JPMorgan lifted its ASML price target to $2,200 from $1,813 and reiterated a Buy rating .
• June 17: Citi issued a bullish call on wafer-fab equipment spending for AI capacity build-outs, pushing ASML shares up 4.1% in Amsterdam .
• June 22: Bank of America raised its ASML target to $2,345 from $2,268, maintaining a Buy rating and citing a strong forward order book and AI-driven demand visibility .
• June 22: Wells Fargo raised its target to $2,200 from $1,750, maintaining an Overweight rating .

By June 22, all 19 analysts tracked by LSEG had assigned a Buy or Strong Buy rating to ASML . This pre-existing analyst momentum meant that when Micron delivered its beat, the positive sentiment across the semiconductor equipment chain was already primed.

U.S.-China Export Control Tensions — A Lingering but Not Dominant Overhang

U.S.-China export restrictions remained a live risk for ASML throughout 2026, but the Micron-driven rally showed that AI demand tailwinds were the dominant factor during the June 24–25 timeframe:

• The proposed MATCH Act in the U.S. House (introduced April 2) would extend export controls to cover ASML's deep ultraviolet (DUV) lithography systems, directly threatening a significant portion of ASML's China revenue .
• The Dutch government formally objected to the extraterritorial implications of the MATCH Act in May 2026, arguing it could harm Dutch semiconductor companies .
• In mid-June, the U.S. expressed concerns to ASML that one of its EUV machines may have reached China in violation of export curbs; ASML denied ever delivering an EUV system to China .
• ASML's CEO Christophe Fouquet had earlier flagged that 2026 would be a growth year but that U.S. pressure for additional restrictions would persist .

However, during the June 24–25 rally, these geopolitical risks were overshadowed by the sheer magnitude of Micron's numbers and the reaffirmation that AI infrastructure build-out is accelerating globally.

Broader AI-Driven Demand Context in 2026

The sector-wide rally is best understood as part of a sustained AI infrastructure boom:

• ASML's share price soared 120% over the 12 months prior to May 2026 and was up 53% year-to-date, driven by booming AI demand for advanced chipmaking equipment .
• ASML's Q4 2025 orders hit a record €13.2 billion, far exceeding the analyst expectation of €6.32 billion, signaling surging AI-driven demand for its lithography tools .
• Morningstar noted ASML "plays an essential role in the semiconductor supply chain" and that the AI rally "continues apace" .
• The Micron results specifically demonstrated that AI data center memory demand (HBM and high-bandwidth DRAM) is scaling at a pace that surprised even bullish analysts, with Micron's DRAM revenue up 343% year-over-year, accounting for 76% of total revenue .

The combination of Micron's eye-popping beat, already-elevated analyst targets, and the broader structural AI spending cycle created a powerful confirmation signal for investors — one strong enough to push European chip stocks and the Stoxx 600 to new highs despite unresolved U.S.-China trade frictions.

Guidance was the key catalyst. Micron projected fiscal Q4 2026 revenue of approximately $50 billion, far above the Wall Street consensus of around $43.2 billion . The company also guided to adjusted EPS of about $30–$32, compared to the $24.30 consensus estimate . CNBC reported that the results "beat Wall Street forecasts by a wide margin" and "helped push U.S. stock futures higher and improving sentiment across AI-exposed tech names" .

European Semiconductor Stock Performance

The Micron beat triggered a synchronized rally across European chip names on June 25:

• ASML rose 4.5% as part of the broader sector move . Its U.S.-listed shares closed at $1,213.56 on June 25, up 15.74% in a single session .
• ASM International NV surged 5.5% to €1,022, recovering sharply from a two-day decline that had pushed shares from above €1,000 to a previous close of €969.20 .
• Infineon gained 3.1% and STMicroelectronics rose 5.1% .
• The broader Stoxx Europe 600 notched a record high close, with the AI rally triggered by Micron's and Qualcomm's strong forecasts lending early-session support .

Analyst Upgrades Before and After Micron's Report

A cluster of major Wall Street banks had already raised price targets on ASML in the weeks leading up to Micron's earnings, amplifying the positive reaction when the results landed:

• June 4: JPMorgan lifted its ASML price target to $2,200 from $1,813 and reiterated a Buy rating .
• June 17: Citi issued a bullish call on wafer-fab equipment spending for AI capacity build-outs, pushing ASML shares up 4.1% in Amsterdam .
• June 22: Bank of America raised its ASML target to $2,345 from $2,268, maintaining a Buy rating and citing a strong forward order book and AI-driven demand visibility .
• June 22: Wells Fargo raised its target to $2,200 from $1,750, maintaining an Overweight rating .

By June 22, all 19 analysts tracked by LSEG had assigned a Buy or Strong Buy rating to ASML . This pre-existing analyst momentum meant that when Micron delivered its beat, the positive sentiment across the semiconductor equipment chain was already primed.

U.S.-China Export Control Tensions — A Lingering but Not Dominant Overhang

U.S.-China export restrictions remained a live risk for ASML throughout 2026, but the Micron-driven rally showed that AI demand tailwinds were the dominant factor during the June 24–25 timeframe:

• The proposed MATCH Act in the U.S. House (introduced April 2) would extend export controls to cover ASML's deep ultraviolet (DUV) lithography systems, directly threatening a significant portion of ASML's China revenue .
• The Dutch government formally objected to the extraterritorial implications of the MATCH Act in May 2026, arguing it could harm Dutch semiconductor companies .
• In mid-June, the U.S. expressed concerns to ASML that one of its EUV machines may have reached China in violation of export curbs; ASML denied ever delivering an EUV system to China .
• ASML's CEO Christophe Fouquet had earlier flagged that 2026 would be a growth year but that U.S. pressure for additional restrictions would persist .

However, during the June 24–25 rally, these geopolitical risks were overshadowed by the sheer magnitude of Micron's numbers and the reaffirmation that AI infrastructure build-out is accelerating globally.

Broader AI-Driven Demand Context in 2026

The sector-wide rally is best understood as part of a sustained AI infrastructure boom:

• ASML's share price soared 120% over the 12 months prior to May 2026 and was up 53% year-to-date, driven by booming AI demand for advanced chipmaking equipment .
• ASML's Q4 2025 orders hit a record €13.2 billion, far exceeding the analyst expectation of €6.32 billion, signaling surging AI-driven demand for its lithography tools .
• Morningstar noted ASML "plays an essential role in the semiconductor supply chain" and that the AI rally "continues apace" .
• The Micron results specifically demonstrated that AI data center memory demand (HBM and high-bandwidth DRAM) is scaling at a pace that surprised even bullish analysts, with Micron's DRAM revenue up 343% year-over-year, accounting for 76% of total revenue .

The combination of Micron's eye-popping beat, already-elevated analyst targets, and the broader structural AI spending cycle created a powerful confirmation signal for investors — one strong enough to push European chip stocks and the Stoxx 600 to new highs despite unresolved U.S.-China trade frictions.