Memory Chips Seen With Stronger Fundamentals Than Optical Sector Amid AI Boom

An analysis of the semiconductor market suggests memory chip stocks currently have more durable fundamental support than their counterparts in the optical components sector, according to a report from Investing.com. The memory sector's strength is rooted in its massive market scale and clear demand visibility for High Bandwidth Memory (HBM), a critical component in artificial intelligence infrastructure.

Memory's Fundamental Case

The memory chip market benefits from its significant size, estimated at over $1 trillion compared to the $60–$80 billion optical market, which attracts deeper analyst coverage and institutional interest. This is supported by substantial projected revenue growth for key players, with Investing.com citing figures of 167% for Micron (MU) and 145% for SK Hynix (000660).

Driving this growth is the booming demand for HBM. The analysis referenced a forecast from Micron, which projects the HBM market will grow from $35 billion in 2025 to $100 billion by 2028, representing a compound annual growth rate (CAGR) of 40%.

Optical's Higher-Beta Rebound

The case for optical component stocks rests on different factors, including potential U.S. policy protection against Chinese transceiver imports, record order bookings, and technological leadership in 200G-per-lane products. These tailwinds have fueled significant revenue growth estimates for companies like Lumentum (LITE) at 83.2%.

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However, the optical theme carries distinct risks. The analysis noted that much of the positive outlook may already be priced into stocks, with Lumentum having gained approximately 700% over the current cycle. Furthermore, some companies in the sector carry higher leverage; for instance, Lumentum's debt-to-equity ratio was flagged at 36%, a risk not shared by the major memory producers.

Recent Performance and Market Sentiment

Despite the differing fundamentals, both sectors have experienced a significant, broad-based pullback recently. According to data as of October 26, major stocks in both themes fell between 12% and 25% over the past month, suggesting wider market or sector-specific concerns rather than company-specific issues.

This downturn has left major players well below their recent peaks. As of October 26, both Micron and Lumentum were trading 27% below their 52-week highs. Meanwhile, exchange-traded funds (ETFs) tracking both themes, such as the Roundhill Memory ETF (DRAM) and the Tema Photonics & Optical ETF (LAZR), are showing Relative Strength Index (RSI) readings near or below 35, a technical indicator that suggests the assets may be oversold.