Mid-Year 2026 Review: Index +8%, Memory Stocks Up 7x. What to Focus in Q2?

The first half of 2026 is officially over.

As of June 30, $S&P 500(.SPX)$ is up 8.7% year to date, $NASDAQ(.IXIC)$ has gained 11.1%, $Dow Jones(.DJI)$ is up 8.6%, while the Russell 2000 has surged more than 20%, making small caps the clear leader.

The index looked calm, but stock picking was anything but. AI hardware names produced multiple multi-baggers, while software stocks briefly erased nearly $1 trillion in market value. The Philadelphia Semiconductor Index swung from gains of more than 6% in a single day to losses approaching 8%.

What Happened in the First Half?

  1. The Iran conflict pushed oil prices higher and revived stagflation fears.

  2. Kevin Warsh took over as Fed Chair and, with one press conference, shifted the market from pricing in rate cuts to pricing in rate hikes.

  3. SpaceX completed the largest IPO in history.

  4. And markets briefly embraced the narrative that AI would replace software.

The Real Theme: Money Shifted From Buying GPUs to Building AI Factories

For the past few years, the biggest bottleneck in AI was compute, making NVIDIA GPUs the scarcest asset in the market.

But in 2026, as more GPUs were deployed, the next bottlenecks became impossible to ignore.

HBM; Server memory; Enterprise SSDs; Networking; Power; Cooling.

Capital began rotating away from simply buying GPUs toward building the entire AI infrastructure stack, searching for the next critical shortage.

Memory turned out to be that shortage. As AI models became larger and more frequently deployed, demand for storing, moving, and accessing data exploded.

The four major storage companies dominated the performance rankings among U.S. companies with market caps above $50 billion (returns through June 30):

Together, they cover nearly every layer of AI data-center storage.

It wasn’t just memory, AI infrastructure leaders also delivered spectacular gains

  • $Intel(INTC)$ +257%: A classic turnaround story fueled by strategic investments, Intel 18A, advanced packaging, and renewed confidence in U.S. semiconductor manufacturing.

  • $Dell Technologies Inc.(DELL)$ +229%: Benefiting from surging demand for integrated AI servers and rack systems.

  • $Marvell Technology(MRVL)$ +227%: Riding custom AI silicon and high-speed networking, with Jensen Huang publicly calling it a potential trillion-dollar company during COMPUTEX.

  • $Applied Optoelectronics(AAOI)$ (+331%) and $Lumentum(LITE)$ (+131%) surged as optical interconnects became another critical bottleneck alongside storage.

  • $Bloom Energy Corp(BE)$+217%: Providing rapidly deployable on-site power, reinforcing the idea that “the endgame of AI is electricity.”

  • $ARM Holdings(ARM)$ +214%: Cloud providers increasingly adopted Arm CPUs to lower power consumption and total ownership costs, while Arm expanded further into Agentic AI processors.

  • $NEBIUS(NBIS)$ +212%: Building and operating AI data centers and cloud infrastructure.

Money didn’t leave AI. It simply expanded from GPUs into storage, networking, servers, power, and cloud infrastructure. That suggests the AI bull market isn’t over. It’s just entering its next phase.

The Second Half Is About Earnings, Not Multiple Expansion

Wall Street remains broadly constructive, but there’s one common message. The next leg higher has to come from earnings.

Not simply higher valuations.

Goldman Sachs raised its year-end S&P 500 target to 8,000, projecting full-year EPS of 340. JPMorgan sees 7,800 with EPS reaching 350.

Industry analysts in aggregate predict the S&P 500 will see a price increase of 21.2% over the next twelve months. This percentage is based on the difference between the bottom-up target price and the closing price for the index as of yesterday (June 25).

Meanwhile, Amazon, Microsoft, Google, and Meta are expected to spend between $670 billion and $800 billion on AI infrastructure in 2026, an increase of more than 80% year over year.

This earnings season won’t simply be about revenue. Investors will want answers.

  • How much of cloud growth is coming from AI?

  • Is AI improving advertising monetization?

  • Are enterprise AI products generating meaningful paid adoption?

  • Can storage shortages persist?

  • Will AI server orders remain strong?

  • Can power infrastructure projects stay on schedule?

  • Will hyperscalers continue increasing capex?

The answers to those questions will determine whether this AI rally still has room to run.

Discussion

How has your first half of 2026 gone?

The major indices gained only around 8%, yet memory and AI infrastructure stocks delivered returns of several hundred percent. Did you outperform, or were you stuck in software names or gold?

Will Q2 earnings confirm AI’s earnings power—or expose an AI bubble?

For the second half, would you rather keep buying memory stocks, or rotate into the next AI infrastructure themes like power generation or cloud?

Leave your comments to win tiger coins~

# Mid-Year 2026 Review: US Stocks Best Quarter Since 2020! What Leads in H2?

Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.

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  • Shyon
    ·06-30 17:11
    TOP
    For me, the first half of 2026 was about staying disciplined and focusing on AI infrastructure instead of chasing hype. I continued buying quality companies after pullbacks, especially in semiconductors and cloud infrastructure. While not every trade was perfect, I'm satisfied with my overall performance.

    For Q2 earnings, I think the market needs proof that AI is driving real earnings growth, not just higher valuations. If companies continue delivering strong results and hyperscalers keep investing, I believe the AI rally still has room to run.

    In the second half, I'm staying bullish but more selective. I still like memory and AI infrastructure, while also watching power and networking as the next AI opportunities. My plan is to keep buying quality stocks during market dips and stay invested for the long term.

    @Tiger_comments @TigerClub @TigerStars

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  • Universe宇宙
    ·06-30 18:59
    The current war isn't going to crash the markets because of the 'roti prata effect', Wall Street is just going to flip the narrative and adapt like it always does. I’m calling at least double-digit stock market performance growth by the end of 2026 for the big hitters: US, South Korea, China, and Japan. Even other countries like Singapore and Taiwan are going to absolutely crush it in 2026!

    Tech stocks are going straight to the moon given the huge profit driven by storage and memory. AI is driving a massive wave of consolidation, swallowing up smaller companies to form unstoppable mega-caps, which is going to supercharge the stock market valuations, making today's valuations cheaper than tomorrow!

    $Space Exploration Technologies Corp(SPCX)$ $iShares MSCI South Korea ETF(EWY)$ $Technology Select Sector SPDR Fund(XLK)$ $iShares Asia/Pacific Dividend ETF(DVYA)$

    @MHh @Shyon @koolgal @icycrystal

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  • 北极篂
    ·06-30 17:41
    至于投资策略,我个人依然偏向AI基础设施,而不是追逐已经炒高的热门概念。存储、网络、电力及高速互联,我认为仍属于AI长期受益者。当然,经历上半年大涨后,波动一定会加剧,但只要盈利持续兑现,我更愿意把回调视为布局机会,而不是牛市结束的信号。真正的赢家,往往不是追最热的股票,而是提前看见产业链下一块最稀缺的拼图。
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  • 北极篂
    ·06-30 17:41
    我认为,下半年真正值得观察的,不再是估值还能不能继续提高,而是企业能否兑现盈利。未来财报市场最关心的,将是AI到底有没有持续带来收入增长、企业客户是否愿意持续投入,以及超大规模云服务商是否继续扩大资本支出。如果这些答案仍然是肯定的,那么AI行情还有机会继续延续。
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  • 北极篂
    ·06-30 17:41
    但今年资金明显开始寻找新的瓶颈,焦点从「买GPU」转向「建AI工厂」,包括HBM、DRAM、企业级SSD、光模块、电力、散热及云端基础设施,都成为资本追逐的新方向。
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  • 北极篂
    ·06-30 17:40
    我觉得2026年上半年最大的收获,不是指数涨了多少,而是AI投资逻辑已经进入了第二阶段。过去几年,市场都在抢GPU,大家认为只要拥有算力就拥有未来。
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  • Lanceljx
    ·06-30 21:00
    AI's gains have been unusually concentrated. While the S&P 500 rose only about 8%, memory and AI infrastructure names surged several hundred percent, showing how selective this rally has been.

    Q2 earnings are the next major test. Strong AI-driven revenue, margins and capex could justify current valuations. Any signs of slowing demand or weaker guidance could trigger sharp profit-taking.

    For H2, I'd avoid chasing memory after its huge run. I'd keep core exposure but gradually diversify into other AI infrastructure areas such as power, grid equipment, cooling, networking and cloud. The AI theme remains intact, but spreading exposure across the value chain offers a more balanced risk-reward than doubling down on the year's biggest winners.

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  • Miracle C
    ·06-30 18:30
    以当前阶段来看,我认为AI基建仍处于早期,短期内会有波动风险,但长期仍然是未来十年的大方向。尤其是有实际业绩支撑的存储方向,仍然处于严重的供不应求时期。
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  • AliceSam
    ·06-30 18:02
    从半导体设备、晶圆代工、存储芯片,到HBM、先进封装、光通信,几乎所有AI算力相关环节同步走强
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  • 北极篂
    ·06-30 17:41
    这也是为什么很多人觉得指数只是上涨约8%至11%,但真正赚钱的人却赚了几倍。像美光、闪迪、西数、希捷等存储股,以及戴尔、Marvell、AAOI等AI基础设施企业,涨幅远远跑赢大盘。市场不是离开AI,而是资金开始向整个产业链扩散,谁能解决AI下一阶段的瓶颈,谁就拥有更大的成长空间。
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  • highhand
    ·06-30 17:39
    I would rotate into other themes. there's a Chinese saying. 风水轮流转
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  • Gilly87
    ·06-30 16:44
    My first half of 2026 went well. I stayed focused on AI rather than chasing every market rotation, and it's been rewarding to watch the story evolve from GPUs to the entire infrastructure stack. I think we're still in the early innings of AI, but the second half will definitely be about execution. Earnings need to justify these valuations, especially with hyperscalers spending hundreds of billions on AI capex.
    For H2, I'm keeping exposure to semiconductors and AI infrastructure while also watching power and networking closely. Memory has had an incredible run, but I'm looking for the next bottleneck rather than chasing the last one. As
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